Destroy All Humans!

Destroy All Humans!

40 Achievements

10-12h

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The Mandatory Option

The Mandatory Option

Complete all optional mission objectives! (Use the Holopoxdeck if you have to.)

3.9%

How to unlock the The Mandatory Option achievement in Destroy All Humans! - Definitive Guide

During each mission, you will be presented with option objectives to complete. They can range from killing someone a specific way or staying undetected. Majority of these are rather easy and can be completed without requiring a 2nd playthrough but if you do miss one, you can replay the mission via the Holopoxdeck.


Mission 1 - Destination Earth


Mission 2 - Earth Women are Delicious


Mission 3 - Citizen Crypto


Mission 4 - Alien Pool Party


Mission 5 - Television of Doom


Mission 6 - Aliens Stole my Brain Stem


Mission 7 - This Island Suburbia


Mission 8 - Teenage Zombies from Outer Space


Mission 9 - South by Southwest


Mission 10 - Foreign Correspondent


Mission 11 - Suburbs of the Damned


Mission 12 - Whatever Happened to Crypto 136


Mission 13 - The Mutant Menace


Mission 13.5 - The Wrong Stuff


Mission 14 - Duck and Cover


Mission 15 - It's a Wonderful Armageddon


Mission 16 - Furon Down!


Mission 17 - Mr. Crypto Goes to Capitol City


Mission 18 - Armquist vs. the Furons


Mission 19 - The Lone Gunman


Mission 20 - The Furon Filibuster


Mission 21 - Shocking Developments


Mission 22 - Attack of the 50-Foot President
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29 Jul 2020 12:01

36 Comments
When we miss one, and replay it via the Holopoxdeck, can you exit the level once you have that particular missing objective or does the level need to replayed through its entirety?
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By Raistlin 156 on 02 Aug 2020 12:36
You need to complete the mission, Raistlin 156.
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By Zefph on 02 Aug 2020 14:39
One useful thing I found out today - you don't need to complete all of the objectives on the same playthrough. You can collect one objective on one playthrough, and then replay and collect a different one. At the end of the mission, it will say you didn't collect everything, but if you then consult the Holopoxdex it will show all previously achieved objectives as met.
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By Mattricus on 02 Aug 2020 18:43
Anyone else not have the achievement pop?
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By Rk Eden13 on 10 Aug 2020 17:58
The achievement didn't unlock for me either today

EDIT: The update the other day fixed the achievement for me as well. I also just replayed one mission quickly.
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By Ungro on 11 Aug 2020 02:37
Same thing. Got the last optional objective today, and it did not unlock. 100% on all missions.
UPDATE: There was an update today. Did a quick mission, and the achievement popped at the end of it.
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By Dr Sartan on 11 Aug 2020 13:17
They updated it today I just did the first mission again and didn’t complete the optional objectives and it popped.
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By Rk Eden13 on 11 Aug 2020 17:57
I can't kill soldiers with grenades while defending the tower. The big robots do too much damage to the towers before I can reroute any grenades
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By SL1CK CHR1S on 24 Oct 2020 21:19
mission 11 is bullshit, its impossible to kill anyone with the grenades
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By Guneagle01 on 25 Oct 2020 19:19
How do you throw the agent with? the saucer
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By ColumnedJet9 on 08 Jan 2021 13:51
mission 11 all the side objectives completed automatically for me . Apparently my npcs were killing each other cuz I was too busy to bother and got all done.
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By TheOnlyMatto on 05 Feb 2021 09:20
On mission 11, if you miss a single grenade and don't use PK on it immediately, you pretty much fail. You have to be flawless with that part. Very annoying
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By Bunny Breakfast on 22 Feb 2021 20:36
Just want to point out with the latest patch they increased the damage grenades did to enemies which made mission 11 alot easier got it done first try
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By Bk LuCKY ChaRMS on 09 Mar 2021 05:40
Hmm. Went through and double checked and I got all optional objectives but no achievement. It's been three days now. Did them all on one playthrough and replayed the first mission like others have said and nothing. Even did a restart.
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By Be5tInTheWorld on 18 May 2021 04:34
Mission 10 - how do you get past all those Gmen and EMP mines as cook? Everywhere I walked, my disguise is blown.
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By neeker75 on 23 May 2021 00:46
Be5tln, same happened to me. Try to replay the probe mission. It unlocked for me today. Mission 6.
I did the first mission, 5 and 6. At 6th it unlocked
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By Dhedalo on 26 May 2021 07:30
Dhedalo, thanks for the tip but that didn't help either. At this rate I'm probably going to have to do a new playthrough.
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By Be5tInTheWorld on 27 May 2021 02:36
@neeker75 No, you are wrong, I have done this on WIN10 and Xbox now as holobob. You enter from the side entrance after walking along the beach to the right. Then talk to the soldier inside the fence and after answering some questions he lowers the fence.
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By AlterPred on 21 Jun 2021 18:04
TIP for Mission 14 killing them with the rocks took me quite a few hits then I realized to almost kill them with the zap gun then just one hit with the rocks - all in all an amazing guide -- THANKS BRO!!!!!!!!
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By TREX1979 on 27 Jun 2021 00:28
I complete all optional missions, why I can’t achieve?
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By SoakedChain358 on 28 Jun 2021 13:22
@SoakedChain358

Did you finish the final boss fights? I finished all the mission objectives beforehand and it didn’t unlock for me until I knocked Silhouette out of the air, which didn’t even show up as acknowledged until the end of phase 3. Then, I got the achievement.
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By Capnkillu on 28 Jul 2021 02:14
I’ve read that you have to complete the first mission again! Seen a couple vids where they do it and then the achievement pops. I tried, and it actually worked, finally finished the game 100%.
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By JasonHawkTTV on 06 Aug 2021 13:43
Mission 14 is ridiculous
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By SincereSeeker6 on 23 Aug 2021 22:13
I completed all optional objectives got no achievement i replayed every mission again still nothing i give up.
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By H8Bomb on 17 Sep 2021 08:48
I completed all optional objectives and no achievement for me. It was just a waste of time.
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By Eskibon on 18 Nov 2021 18:12
Hating mission 14 too. Killing with rocks is pretty stupid.
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By AcaelusT on 16 Jan 2022 02:24
Não apareceu a conquista pra mim tambem.
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By XGamez97 on 19 Feb 2022 11:25
the achievement did not appear for me, I have already unlocked other achievements, after having done it and it still does not unlock.
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By XGamez97 on 19 Feb 2022 11:33
The conquest opened up after me, repeating a few missions, repeating two and appeared, phew.
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By XGamez97 on 19 Feb 2022 11:53
I had to complete the mission and return to the menu screen before the achievement would unlock.
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By Brave Tanuki on 13 Mar 2022 21:34
Just to add to this solution the optional objectives do not all have to be done in one go. The archives keep track and of which ones you've completed.
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By Lonesquiff on 16 Mar 2022 23:42
Don't know if was just for me but I had to replay a mission (even without complete the optional objects) and then it popped for me
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By SistedodIta on 21 Apr 2023 18:26
it took replaying 4 missions for it to finally pop ffs. got it after doing the objective on mission 6 and then finishing it
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By II Dish II on 26 Apr 2023 12:52
Can confirm, was bugged just redid mission 6.
Kudos to Dish.
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By SwitchingRain57 on 03 May 2023 04:24
If you're struggling with grenades on Mission 11, weaken them first with the Zap-o-Matic, then grenade them. Grenades only do 50% damage (they die from the force generated by grenades, which doesn't count), so they need weakening first.
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By UncleRaven69 on 16 Dec 2020 12:15
The guide is wrong for Mission 10. You cannot get to Wither if you're in the cook's holobob. You need to press X to implant the thought of sending food to him, and then escorts him while he makes his way to the cave. There's only one safe path when doing so where you can avoid all EMP mines and GMen. The cook needs to talk to the guard at the forcefield control to release the forcefield. If you're holobobbing him, the cut scene will not happen.

After you get into the cave, you can then holobob to the cook and walk to Wither.
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By neeker75 on 23 May 2021 06:03
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Found this on Powerpyx and it was super helpful for me. It lists the optional missions and what to do to complete them.

All credit goes to whoever posted it there.

https://www.powerpyx.com/destroy-all-humans-optional-objecti...
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26 Sep 2021 05:04