Borderlands 3

Borderlands 3

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Slaughterhouse 3

Slaughterhouse 3

Completed all the Circles of Slaughter.

20

2.54%

How to unlock the Slaughterhouse 3 achievement in Borderlands 3 - Definitive Guide

There are three Circles of Slaughter that need to be completed. They can be found on Pandora, Promethea and Nekrotafeyo.

Pandora's is "The Slaughter Shaft" and the entrance can be found in Konrad's Hold.

Promethea's is the "Cistern of Slaughter" and the entrance can be found in Meridian Metroplex.

Nekrotafeyo's is "Slaughterstar 3000" and the entrance can be found in Desolation's Edge. This one is different than the rest, as you will need to go back to Sanctuary and discover a new planet.

Here's screenshots showing the locations of all 3 entrances. https://imgur.com/gallery/gouYRgA

If you find you are struggling, you can go into your settings and put the difficulty down to easier to help you beat the circles of slaughter.

Edit: If you're going to leave a negative, let me know why. I get that the slaughter's are a buggy mess. However, if there is something that you feel is missing from the solution, let me know what it is.
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17 Sep 2019 22:13

70 Comments
Is anyone having an issue with the last round not finishing. Always gets stuck on 4/5 with no enemies spawning?
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By CjMAN911 on 18 Sep 2019 10:04
slaughterstar 3000 also has a bug that if you navigate to there and then don't use the drop pod before navigating somewhere else then the next time you try to go there you can't since the option isn't on the navigation screen anymore.
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By xNSHD on 18 Sep 2019 13:59
@CjMAN911 if it was the Cistern one, the flying raks can go behind everything, you need a homing grenade to pull them back (if you can even kill them).
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By evolsoulx on 18 Sep 2019 14:15
This is a hard wait from me, Cistern round 4 wave 4 is ridiculously difficult. The differences between all the other waves and that one are night and day. The Bloated Rakks are tanks with massive HP and also spawn Rakklesnakes constantly, then when you have nothing but rakks left, they’ll fly out of bounds and despawn forcing you to start the round over again. My friend and I would have beaten this already, but it continuously glitches on us (4 times in a row). These circles of slaughters seem very poorly designed.
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By Raw Sauce Ross on 20 Sep 2019 02:26
I found the entrance to Cistern of Slaughter but a door is closed and I can't get in
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By Arador on 21 Sep 2019 01:53
I am having an issue with Cistern. On the final round, when those pregnant enemies keep spawning the little exploding enemies, the round will not complete. There are no enemies left and I can't continue. I've played it 5 times and the final round never resolves.
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By Faustus PHD on 21 Sep 2019 20:58
If you're having trouble in the middle rounds of the Slaughterstar 3000 fight, the legendary Transformer shield is a godsend. It grants complete immunity to shock damage and instead it recharges the shield.
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By OhMyGoth1 on 21 Sep 2019 21:01
I did this solo and it was super annoying. In SlaughterStar: there must be a bug with shock heavies, their pylon attacks applying the bonus shield damage to health as well! They do ungodly amount of damage. Also, Cistern final wave is ridiculous! Gearbox need to invistigate those chubby Rakks.
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By Inspector Adam on 22 Sep 2019 11:15
If anyone has a mid leveled character with access to all three arenas, I have a level 50 gunner and will gladly do the bulk of the legwork so we can knock this achievement out.
GT: BigTymer2047

Edit: Got it.
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By BigTymer2047 on 22 Sep 2019 17:00
Final round and the game crashed🤬
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By Mr MahHa on 27 Sep 2019 20:59
Had a couple of problems on S3000. On one wave an enemy glitched behind a high wall and only zanes drone could very slowly zap it to death. On the final wave one of the huge bosses knocked me off the map all I could do to help my buddy was access the elevator to the glass viewing area and shoot from there. Also on the lowest platform there are two doors where many enemies spawn. A Flakker works well here. Good luck.
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By Death in Dub on 29 Sep 2019 12:58
oh and between rounds you can restock at the ammo dump.
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By Death in Dub on 29 Sep 2019 13:01
This might be a stupid question, but does this achievement track or not. I'm only asking since I completed the Cistern of Slaughter twice with people online and I don't know if the achievement tracks when you look at the achievements
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By LostTemplar62 on 30 Sep 2019 03:00
@LostTemplar62 No. They do not track.
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By BigTymer2047 on 30 Sep 2019 06:51
I soloed Slaughter Star last night, but would love a group to run the others, as solo was a huge time commitment. I'm a level 50 Zane. I also didn't realize you couldn't save process after completing a full run, and had to restart after taking a break after round 3 :( Hit me up on Xbox if you'd like to do this.
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By Dabima on 30 Sep 2019 19:47
Do these not count if you do them in matchmaking or if someone else turns the mission in?? Just did all 3 circles and no achievement...
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By De4thM4chin3 on 01 Oct 2019 13:52
I’ve done all 3 circles and still do not have the achievement. Same for eridian slabs
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By Dabima on 01 Oct 2019 21:46
I’d like to finish this since the “platinum” achievement is now fixed. My gt is actually Poshicle, feel free to msg me
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By PoshVevo on 03 Oct 2019 19:18
Has anyone tried setting the difficulty to easier? If so, how did it work out?
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By Flyghboy on 03 Oct 2019 23:43
Completed all 3 of them, but did not unlocked achievement
Looks like its glitched
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By improlight on 04 Oct 2019 21:49
Worked fine for me, are you the host improlight?
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By Arador on 05 Oct 2019 10:50
I’m beginning to wonder if you do need to be hosting in order for this to count. I’ve beaten every circle at least 5 times each now but it’s all been in matchmaking.
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By De4thM4chin3 on 05 Oct 2019 10:58
Pretty sure it connects to the missions on your personal account so you would have to be hosting
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By Arador on 06 Oct 2019 01:39
Nope. Just hosted and beat all 3 again. Completely bugged!!
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By De4thM4chin3 on 08 Oct 2019 18:05
Thank you for the difficultly tip. Wow this is doable now lmao
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By MCmichaelD on 10 Oct 2019 22:12
the s3000 is bullshit, and now my game is fucked as well. I'm lvl 50 BM and joined my nephews game who was 20 lvls' lower and he started a game through the social area since he only been to 3 planets so far. After zoning in, game froze and now my lvl 50 BM only shows that he has been to first 3 planets even though all quests are done, so now I can't go back and kill bosses for loot and I can't advance by quests since they are all done. Disappointed how many glitches there are
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By on 15 Oct 2019 03:35
If someone could help me out on slaughterstar 3000 please. Just message me on xbox
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By YogiBlue49 on 27 Oct 2019 06:34
Just in case it helps, there is no achievement tracking on this one.
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By dingleingus on 11 Nov 2019 15:26
Ran Cistern 4 times in multiplayer, 3 of which I had to quit due to enemies glitching out. Hope others have better luck...
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By JORAX on 01 Jan 2020 01:26
Actually, I lied - it didn't actually complete (just checked my quest log). I also tried twice more and it stalled on the last wave both times. So far 0 for 6, and at least 2 hours wasted.
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By JORAX on 05 Jan 2020 04:09
I've done 2 in solo but they're not in the completed mission logs. Any workaround or just try again?
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By Zeta Sigh on 05 Jan 2020 23:08
Really need help with slaughter star 3000!!! Can't find any match! Gamer tag is fang foom
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By Fang Foom on 15 Jan 2020 15:15
Should these appear in your quest log under completed?

I got it checked off in the planet view, as it says all missions are done in the zone.
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By Lavindathar on 18 Jan 2020 02:39
If you see my comment (2 above yours) I had a similar issue. I think one was completed in the log and 2 weren't in there at all despite me doing them but all the achievements still popped, including the all side mission one.
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By Zeta Sigh on 18 Jan 2020 09:06
How long do they take to do? Solo and coop?
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By C3LLDW3LLER on 31 Jan 2020 07:13
2 hours for me approximately
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By Zeta Sigh on 31 Jan 2020 09:57
Just a tip for those who are having trouble with slaughter star 3000 solo, I camped in the left area of the arena and enemies would get stuck on wall posts which helped tremendously. If things get too intense then jump down to the bottom floor and run a circle back to the camping spot. The few times I did go down, my pet would revive me (a very helpful perk as beastmaster). Make sure to have a good corrosive weapon for the last round and change settings to "Easier" in the main menu options.
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By Fuzzy Churro on 04 Feb 2020 00:57
I've completed all 3 (solo) and the achievement is still locked 😒.
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By WiseManWhite on 13 Feb 2020 02:05
Hard to do co op when the game crashes doing matchmaking.
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By C3LLDW3LLER on 16 Feb 2020 20:00
looking for someone to help me with cistern of slaughter it keeps getting bugged for me but i read somewhere that it can help doing it coop. Message me if you are interested
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By LoosedChart on 22 Feb 2020 09:38
Last wave last round and one enemy left? stuck and not moving. Annoying.
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By C3LLDW3LLER on 22 Feb 2020 19:22
This is glitched for me too. I can solo all, but if someone wants to co-op, hit me up
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By Shadow of Words on 23 Feb 2020 05:18
what's the problem with this? I have yet to start the first "The Slaughter Shaft if you want we can co op are liv 37. Does it require a level to be done?
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By ox BlackJack xo on 29 Feb 2020 09:01
I seemed to get this via a glitch. During Slaughter 3000 I died on wave 5. Went back In and from round 3 they moved the round on at set intervals. I managed to complete the remaining wave in 10 minutes and didnt even fight the two bosses in round 5. So if you're struggling just keep going as you may still get it.
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By DanPalf1991 on 24 Mar 2020 13:44
Is there anyone out there willing to help me with these? I create sessions but they haven’t attracted anybody. I’m a Level 57 so I can carry a lower level vault hunter. My GT is ClaytThaGreat. I can help with the new viral achievement from the Hammerlock/Wainwright DLC in return.
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By ClaytThaGreat on 06 Apr 2020 06:45
I got the achievement for the circle of slaughters but they don't show up on my missions completed. Anyone else have this problem.
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By superfreakey on 08 Apr 2020 23:54
does anyone know if you need beat certain amount of the game or can I still go there at level 19. I finished the first 3 planets and going back to help Rhys
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By InugamiTheHound on 11 Apr 2020 22:56
I just got this achievement with no issues at all, i can confirm you dont need to do all the little challenges for each rounds I missed a few. And I only have the slaughterstar 3000 in my completed quests.
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By NOTOR1OUS T1TO on 16 Apr 2020 05:12
this gonna be dumb question but are the circles of slaughter and Proving Grounds the same thing or are they different? Also should you do these side quests after you beat the game?
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By InugamiTheHound on 20 Apr 2020 22:03
Did all of it and the achievement wouldn't unlock any ideas of what I should do
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By bossvirus198 on 16 May 2020 13:04
When do they open? I been to the one at Meridian Metroplex and it's locked??
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By oo EVIL GOAT oo on 08 Aug 2021 18:17
Can anyone high level or with modded weapons help with the slaughter star 3000 one? I managed it once solo but it didn’t unlock. I’m level 69 now and can’t even get pass round 2.
Also can anyone confirm whether it counts as a side mission. I’m stuck at %98 with no more missions left?
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By Gouldy1972 on 19 Sep 2021 09:20
So just spent an hour to get to the final round/wave and the game crashes! Ah the joys…. Still can’t believe how long this game takes to load angry
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By metallicafan459 on 18 Nov 2021 22:46
Il drop u like I'm not sure came across any this yet but simple quide , either way drop u like
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By LIAM SLANEY86 on 07 Mar 2022 16:07
Can somebody give me a modded season?
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By viruskiller360 on 11 Mar 2022 04:10
Must have been Fate, just as i reached this crazy section of the game i stumble upon Sejeste Rejes comment above. And what a difference it made. Its like shooting at level 1 enemies again.
Made all three slaughter sections sooooo much easier.
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By Simpso on 13 Apr 2022 15:14
The Mayhem 10 Hail weapon from Moxxi really did the trick during Slaughterstar 3000. I had given up on finishing it solo, but with Hail (the one I received was blue with no elemental damage) all of the enemies just disintegrated. Thanks for the tip, Sejeste Reje!
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By BlenderKitten on 20 Jun 2022 01:07
Is getting the Hail random? All Moxxi keeps giving me is the Terminal Crit smg. Which does a lot of damage, but it has the modifier "slippery when wet" so you you occasional throw it on the ground when firing/reloading. Which sucks during a fight.
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By DrSchlepenstein on 25 Sep 2022 18:54
DrSchlepenstein, I just did this, my first gun was the Hail, but my next 5 we're the crit. And then finally another Hail. I was only tipping $1000
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By Lareves on 26 Sep 2022 06:23
I got a very lucky glitch I think with Slaughterstar 3000. I was determined to do it solo, and died countless times trying. During one attempt, the mission completed during wave 4/5 on my last round. Ironically I stuck around to finish the waves and bosses without dying but it wouldn't have mattered since the objective completed on its own during the battle.
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By local bellboy on 27 Sep 2022 22:51
did they every fix it? this game made it so side quests rounded to your level, making the circle of slaughter missions impossible solo. not sure why they made this choice, it something was too hard in borderlands 1 PS or 2 then id come back later at a higher level, rounding to you level makes zero sense and kills the game.
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By LaTrickster2 on 16 Feb 2023 13:33
I'm beginning to see the frustration. I had no issues (technical issues, that is), with Cistern and Slaughter shaft. Now, in SS 3000, wave 4, some enemy is glitched into the wall, and now I'm stuck.
BTW, great tip on getting the M10 Hail. I've been using Crit, since I almost never need to reload, but I probably would've failed at least once already lol

EDIT: Finished it, but there was someone called Blue Fire I could "target" but he wasn't even visible on the map as a red dot/skull. The round still completed though. weird.
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By I Like Drinkin on 05 Apr 2023 02:51
What a crap game this is. This is the third achievement that isn't unlocking, because somehow Slaughterstar 3000 doesn't register.
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By Don Nielson on 28 Jun 2023 18:29
really poorly designed... got to the final wave of slaughterhouse and one enemy didn't spawn correctly. spent 20 mins attempting to get it to die or come out and attack. died to restart and it glitched again - quit to menu and back ni and the it fails the mission.

now I've got to do it all over again - it's so bloody boring!
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By Sky Maniac on 25 Sep 2019 01:01
I had the same as the above comment, but on the last round (Wave 4/5) of The Slaughter Shaft. TWICE. So annoying! Also found that the 1st wave of every round is by far the hardest, and then gets easier, the difficulty curve makes little sense. Going to leave this for my last achievement and hope I can get it to work. Another thing I'm tempted to do is accept the quests, then leave them until I'm Level 50 - it would appear that they stay the same level as when you take them.
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By NoHeroes94 on 26 Sep 2019 12:04
For my part I ran cistern with two of us 50 and 44 on normal difficulty with nothing exceptional weapon wise.
One of the rakks got caught up in the wall near the elevator after the 44 got downed and was shooting from the top to provide cover fire from the position of relative safety. Ultimately this would become the last enemy on round 5/5 and neither of us could hit it, eventually it either spawned, fell off the map, glitches out or otherwise just damn well became unavailable. Restart required. Opted to say "fuck it" instead.
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By Dingadilly on 05 Dec 2019 08:04
EDIT: Done!
looking to do this with someone, I just need slaughterstar 3000 but I can help with the others if needed! it helps if one person is a higher level than the other, as that player can then host and the enemies will be scaled to the lower level. message me if you're interested!
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By meep3rmanXD on 08 Oct 2020 23:23
To conclude, find someone 3-5 levels above you and host as the lower level participant, before letting them carry you if you're struggling with Slaughterstar 3000 (do your bit as far as possible, you can still be impactful obviously). Trust me, went from a nightmare to being TOO easy due to their level and an OP grenade (not the patched PPB). I couldn't do it solo or with 4 people match-making at a similar level. Doing it with 1 friend who was a Level 50 whilst I was Level 47 we did it the first time with no deaths on either end in around 20-25 mins. You also get so much XP that I went up to Level 50 myself by Round 4, all whilst enemies were still circa Level 46 - 48 due to scaling on your launch level. 1-2 levels can make a massive difference in this game, which is a flaw in this side-activity despite my general enjoyment of the game because I found earlier rounds MUCH harder as I'd level up once or twice mid-circle and then be OP compared to the scale I originally started the circle at.

I can also verify that it would seem that enemies can glitch on ANY of the 3 circles of slaughter and that issues aren't isolated to one map. I had zero technical issues with Cistern of Slaughter or Slaughterstar 3000, the two harder circles which people seem to have the most issues with. On Slaughter Shaft, typically the easiest one and the one I've seen very little pushback on, I had to do it 3 times because on the penultimate wave enemies would glitch behind the vehicle in the South-East (under the long shed thing). My Borderlands 3 experience was reasonably bug-free, but that circle was a pain in the dick.
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By NoHeroes94 on 30 Sep 2019 15:14
this gonna be dumb question but are the circles of slaughter and Proving Grounds the same thing or are they different? Also should you do these side quests after you beat the game?
They are two different things.
The Circles of Slaughter are wave-based killfests. 5 rounds of 5 waves of enemies that must all be killed in order to complete the mission. There are additional optional objectives, like 'get 10 grenade kills' or such, but they are not required to complete the mission, just get you bonus rewards.

The Proving Grounds are different; these are small, linear maps, with multiple big gates blocking you from moving from section to section until you kill all the enemies that spawn in each section. They all end with one last section that has a Boss. These also have option objectives, but in the form of finishing before certain time limits and to finish without dying.

There are 3 Circles of Slaughter (The Slaughter Shaft, Cistern of Slaughter, and Slaughterstar 3000) and 6 Proving Grounds (Cunning, Instinct, Fervor, Survival, Supremacy, and Discipline).
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By CQOzymandias on 30 Apr 2020 16:58
I don't know if this helps anyone, I just did them all solo. Set the game to Mayhem 10, get the Hail from Moxxi by tipping her money - this weapon will be strong, then disable Mayhem and use that weapon. It was really effective even against enemies that wasn't vulnerable to electricity. As of tip to the Slaughterhouses, the first one (The Slaughter Shaft) I basically stood at a stairway and killed the enemies, the second one (Cistern of Slaughter) I would move around a lot but hide behind the dumpster if my health was low and was on the look out for enemies coming from both sides, the 3000 one - ALWAYS BE ON THE RUN and always replenish your ammo after each round. I struggled with ammo at the round 5 and the last wave but I had a pistol I got from the second one that was pretty good that I also used. So have some extra weapons that deal good damage.
I would also recommend to use the other written guide on here, to see what's going on.
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By Sejeste Reje on 11 Apr 2022 14:52
View all 70 comments Show less comments
I had some issues with the circles. So i put some tips below on beating them. It took me a few days and a few tries (especially with Slaughterstar 3000) but i was able to beat them all with Zane (no specific ability build) and 2 of them solo.

The Slaughter Shaft: (Solo)

- This is by far the easiest of the slaughters and i rolled with a decent smg with fire damage. Nothing too specific. I believe i beat this only dying once or twice
- All enemies are human or with shields so a fire weapon helps a ton when dealing with enemies
- Try to kill the BA Tinks before they place down their turrets, it makes life a lot easier

The Cistern of Slaughter: (Co-op)

- This is the only slaughter where downed teammates can respawn and join back in the fight. Therefore it's really simple to beat with multiple people (It's common that people will farm cash and legendary weapons here for this reason).
- The rounds seemed a lot longer with this slaughter. Some rounds honestly felt endless. Just keep an eye on your teammates who go down. This will take the longest time to beat of the 3 slaughters, but you get tons of blue and purple loot from BA enemies.
- The rakks were a pain to take down. I noticed Moze's special was great at taking them down but it will take awhile to kill them as they move quickly around the map.
- Leave the rakks till the end of the round. Focus on the ground enemies
-Fire weapons help a ton.

The Slaughterstar 3000: (Solo)

- This is the hardest of the slaughters and i was surprised i did this solo. I didn't have a specific skill build. I just used the drone for some extra damage and the digi-clone as a decoy to take some of the fire away from me. There are many op builds on youtube and many of them help a ton post-game.
- The gun that helped a lot with this run was the One Pump Chump (watch a video on where to find it). It will 1 critical shot any small enemy and will take 3 critical shots to kill heavies.
- KEEP MOVING!!! Staying in one spot will be the death of you in the middle rounds
- Powerhouse heavies are the bane of your existence and killing them quickly is your main priority. They will deplete your shields and down you in seconds if you're not careful.
- I did not use The Transformer shield for my run but it can help if you find it. In this case keep
powerhouse heavies alive as they will replenish your shields.
- Sometimes small enemy drones will shield or buff enemies (you'll see little drones shooting blue beams). Take these out as some enemies will be hard to kill otherwise.
- The big robots in the end are fairly easy to kill. Just keep running from their rockets and running back and forth from one side of the map to the other while peppering their crit spots
- Use a jakobs rifle or smg as the one pump chump isn't really that accurate.

I really hope their is a patch that makes this easier in the future, but for now these tips seem to work.
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04 Oct 2019 05:48

2 Comments
I have to agree with your opinion about SS3000, that one was a royal pain in the A$$. Though I had the most fun playing through the Slaughter Shaft, even with a few deaths. I completed all Circle of Slaughters solo.
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By WhiskeyCharlie on 15 Oct 2019 10:15
Nice tips, but you should add the locations as well, so it would be a complete solution. +1 from me.
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By psybOltOn on 14 Nov 2020 17:34
For some reason, my quest for the third one was counted as complete in the log even though I never did it. You need to travel to Slaughterstar 3000 from the Sanctuary ship, it counts as a separate planet.
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09 Oct 2021 00:00

Note: Please use my Spreadsheet to keep track of how many Circles of Slaughter you have completed: LINK

There are 3 Circles of Slaughter in the Game:

Cistern of Slaughter (very buggy if done in Co-Op) - Accessed via Meridian Metroplex: LINK
The Slaughter Shaft - Accessed via Konrad's Hold: LINK
Slaughterstar 3000 - Triggered via a Side Mission on Nekrotafeyo in the Desolation's Edge map: LINK (There's no mission marker in this screenshot, because I lost the original so had to take another after the marker had gone).

Of the 3, Slaughterstar 3000 is the hardest one but can sometimes glitch in your favour and end early when you reach Round 5-4 or 5-5 so take advantage of this if it happens and return to Lt. Wells immediately! The Cistern of Slaughter is also very buggy, especially if done in co-op so play solo to avoid most of the issues. Between each round, you can return to the lobby to refill your health and ammo but don't leave the map or quit the game, else your progress will be wiped and you'll have to redo the entire arena from scratch. Matchmaking for the Circles of Slaughter, is very broken at the moment and won't always match you with people playing the applicable Circle of Slaughter so should be avoided. Credit to Lo Key for the matchmaking info.

Basic Tips:
  • Play patched - Various changes have been made to the Circles of Slaughter since launch, that include progression fixes, stability fixes, difficulty reductions, A.I adjustments, collision detection fixes etc. so make sure you have the latest Patch and Hot Fix installed, before attempting this trophy.
     
  • Use the level scaling to your advantage - The Circles of Slaughter, scale to your level so doing them as early as possible will make life easier.
     
  • Use a build that suits your playstyle - It pays to tailor your character, weapons and skills to your playstyle, because then you can maximise your damage and make it harder to die. If your current build isn't working and just getting you killed, return to Sanctuary III and use the Quick-Change kiosk to respec into a new one. Since the Circles of Slaughter are failable missions, returning to Sanctuary III will auto-fail the one you're currently attempting so keep that in mind.
     
  • Keep moving - Standing still is a great way to get yourself killed so keep moving and strafing to make it harder for enemies to target you.
     
  • Bring some Atlas weapons with you - All Atlas weapons have a homing ability that allows you to hit flying enemies easier and shoot round corners so will make life so much easier in the Cistern of Slaughter and Slaughterstar 3000. If you're playing as Moze, then you can skip the Atlas Weapons you spec into the Demolition Woman tree instead and equip the Vanquisher Rocket Pod skill and Active Tracking mod. In Amara's case, you should spec into the Fist of the Elements tree, then equip Phasegrasp as your active skill and add the Ties that Bind mod but do note that the Bloated Rakk in the Cistern of Slaughter, can't be Phasegrasped.
     
  • Bring weapons in all elements - Focusing on just 1 or 2 types of elemental damage, will make it harder to kill enemies and cause you to waste time and ammo so bring weapons in all elements i.e. Radiation, Shock, Fire, Corrosive and Cryo, plus some explosive and non-elemental ones as well. Maliwan weapons always come in 2 elements so you can switch between them on-the-fly and not have to switch weapons. The Slaughterstar 3000, features mostly robot enemies in the later waves so bring a strong corrosive weapon with you to take them out.
     
  • Recharge Rate and Delay, matters - When it comes to shields, capacity isn't as important as the Recharge Rate and Recharge Delay, because you can have the highest capacity shield in the game but isn't worth anything if it takes forever to recharge so the lower the Recharge Delay and Rate, the better!
     
  • Learn from your mistakes - Mistakes are going to happen but losing your temper won't help, thus you should take a step back for a bit and calm down before figuring out what went wrong.
     
  • Pick up everything - Due to a potential stability problem, it's recommended you pick up and sell all the loot that drops from the various enemies so a memory leak doesn't occur and crash your game.
     
  • Resupply between rounds - After each round has been successfully completed, you will be allowed to return to the lobby and resupply with ammo and buy a new Shield or Grenade mod if necessary. You can resupply during each round by opening the various ammo crates that are dotted around the map but these are limited and won't refill until after that round has been either completed or failed so use them sparingly.
     
  • Upgrade your Ammo capacity - An empty magazine = one very dead player so head to Marcus's store on Sanctuary III and upgrade your Ammo capacity for every weapon, to at least Rare (Blue) or Epic (Purple) status but do note this will require a lot of money so
    Sell all your unwanted items whenever you see a vending machine.
     
  • Tip Moxxi - If you're having a hard time keeping your health up, then tipping Moxxi a lot of money will earn you the Crit SMG and Hail Assault Rifle (you will get one, then have to tip her more cash to get the other). Both of these guns will give you a small amount of health back for each shot that hits an enemy but do note that the Crit will occasionally fall out of your hands when reloading and the Hail requires careful aiming so each shot breaks up in mid-air the way it's supposed to.
     
  • Leave Mayhem Mode alone - Mayhem Mode (which is unlocked after finishing the main story) will make your life much, much harder so leave it turned off if you have it available.
     
  • Cheat - If you have a second account and controller handy, you can cheat your way through the Circles of Slaughter by abusing the same low level character exploit that worked for the Underdome DLC in BL1. To get this exploit to work, do the following: Speedrun your Alt account through the main story until the Circles of Slaughter becomes available, then invite your main account and have them do all the work. The lower your Alt account's level is, the easier the Circles of Slaughter will be for you but make sure both players have the Co-Op difficulty set to Coopetition and not Cooperation (Main Menu => => press once => on the Cogs => change to Coopetition => press to confirm) so the difficulty and loot will scale to the host and not both players. Credit to shatulance for confirming this trick still works.
     
  • Bring a Shock Element Recurring Hex Grenade Mod with you - Enemies getting in, on, above, under and behind the scenery is a problem that has been around since Borderlands 1 but you can alleviate this, by bringing a Shock Element Recurring Hex Grenade Mod with you and lobbing them at the offending enemy. If this doesn't work, then you will have no option but to kill yourself and restart the round from scratch. Credit to H!NO and AerisFlowerGirl for this info.
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There are three slotters in the game.

1. Cistern of slaughter. You can get into it from the planet Promethea, in the Meridian Metroplex zone. Go to the location in the center of the map at the very bottom along the Z axis. There are dinosaurs, rekki and similar fauna.
2. The slaughter shaft. Pandora, Konrad's hold. After taking the elevator up, in the middle of the location. You will pass by along the plot. It will be necessary to kill crowds of bandits - dwarfs, psychos, goliaths and the like.
3. Slaughterstar 3000. Nekrotafeyo. The quest is taken near the blown-up bridge to the storage facility, after which you need to jump to the location using the shelter. You will also pass by as part of the plot. Well, there will be a crowd of Maliwan soldiers, obviously.

General recommendations are something like this:
- Pass as early as possible
- Start the arena when there are 20 percent left to the next level (during the arena there will be a lvl and you can kill the dummies faster)
- Between rounds (before you press the button) you can run to replenish cartridges from the vending machine (the exits are open, the quest does not fail)
- Don’t die (just kidding. You can die, but you’ll have to start the round over again)
- Do not leave the location until the quest is completed.
- If you die a lot of times (around 10-15, I don’t know exactly), then an immortal quest giver will come to your aid. And if there is just a LOT, then the waves will have a small timer, when triggered, the current wave will end, even if all the mobs from it are not completely killed. I don't know if this is a bug or a feature. It works on 1.01.
- If you play with a friend, then in Slaughterstar 3000 after death you can take the elevator into the glass gut and shoot from there. There are probably similar places in the other two arenas.

Sometimes something strange happens and in the level 45 arena mobs spawn not at levels 44-46, but at levels 24-26. I didn’t find any pattern and you shouldn’t hope for it, BUT SUDDENLY.
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22 Sep 2019 19:33

3 Comments
after each death the waves decrease, for the sake of experiment I died 10 times and on Slaughterstar 3000 there were no final bosses at all
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By DrMeow on 30 Sep 2019 14:18
Slaughterhouses with animals and bandits did not cause any particular problems: with bandits there is a lot of space - there is room to run away and restore the shield, with animals it seemed more difficult because of the rakks and the smaller area.
But massacre 3000 turned out to be the most difficult and long, but it was obviously easier because of the weapon - a “skilled burner” accidentally knocked out the pistol, it dropped from one of the mobs at the massacre with the bandits.
So this pistol kills every living thing in one or two seconds, because it has 2 modes for fire and electricity.
This is what helped mow down the Malivans in the 3000 slaughterhouse - they were slaughtered in droves if they stood in a heap. Celine in a heap - a short press was enough. The baker has one drawback - it spins a little before attacking, but you get used to it.
The first 4 rounds went without problems, the 5th played it safe and sat at the very top in the corner of the map - there is only one such place, a ladder leads there - I shot an expert storm with a rifle, it has 17k damage from electricity
Mobs don’t get in there and don’t come out, sometimes dogs and some devils with a scythe come running, but they can all be tracked by radar and quickly mowed down.
The rest were killed with a pistol and other weapons so as not to run out of cartridges (all cartridge belts were pumped up to around 1000 units)
In the end, it’s not a very difficult test, but it’s extremely protracted: if someone screws you over, you really don’t want to start the round all over again.
Passed it at level 60, didn’t try it at earlier levels.
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By BornToKickAsss on 11 Mar 2021 11:26
It may already be too late, but as for me, the one who plays the game as Mose at the training grounds and slaughterhouses will make his life much easier. AutoBear with two machine guns and improvements to heat and increased damage, takes the last two bosses out of the carnage in one go. In general, it allows you to destroy almost everyone in the wave in this short time, the main thing is that it is not destroyed faster than you have time to fully use the skill. Therefore, Mose is the ultimate character for completing the game and is a fighter of course. If suddenly you can’t handle it solo, look for a player with Mose.
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By tamplier1980es on 02 Nov 2020 09:27
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They wrote here that it is better to go through the slaughterhouses as early as possible...
No no and one more time no!
They become disproportionately easier once you reach level 50, when you already have orange equipment and guardian ranks accumulate. In this situation, similar difficulties can arise only at Starbreaker-3000, but here are some tips that will help you avoid even them:
- for the quest "It's alive!" on Nekrotafeyo you can get the legendary Transformer shield, which gives 100% immunity to shock damage; during waves, leave the electric “heavyweights” for later, because their attacks will even heal you.
- Atlas has a very powerful assault rifle Q-module (not legendary, but the most common blue/purple one, drops quite often); it is not elemental, so it removes both shields and health well: if you get bonuses to rifle damage on a class mod and an artifact, ordinary ordinary “Mallivans” will literally fall with five bullets in the torso, and “heavyweights” and “crazy” - where something from 20-30.
- the bosses at the end of the last wave will not be able to do anything to you if you stand against the wall under the canopy on the blue side (behind the corrosive puddle), the main thing is that you have enough ammo; they need to shoot at small glowing yellow dots, for example, in the area of ​​the “knees”.
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04 Oct 2019 00:23