BioShock Infinite

BioShock Infinite

80 Achievements

1,695

42-52h

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Chain Reaction

Chain Reaction

Damaged fifteen foes with an exploding enemy, using the Radar Range in Burial at Sea - Episode 1.

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How to unlock the Chain Reaction achievement in BioShock Infinite - Definitive Guide

Easy way to get this without having to go back to the start of the chapter.

This is obtained on the second to last level "Housewares"

Follow your objectives until you enter a Bistro. Go downstairs, enter 3958 into the keypad so it opens the door to the room that contains the Radar Range, but do not enter..

Now close the vent to your right, which will be your objective, this now saves your profile.

Go back to the room with the keypad and pick up the Radar Range. This will trigger 3 enemies in the room behind you. Simply hold RT until one of the enemies turn red, it will then explode causing a chain reaction, you should get 2/15 toward this achievement right there and then.

Now simply restart checkpoint and re-enter the room with the keypad which should be open, pick up the Radar Range again, rinse and repeat. Should take no more than 5 minutes to get what you need.

As a side note. I didn't have any upgrades on this weapon and I had 10/15 after a playthrough on normal.

With a little luck, you could possibly get 15 by the end of the game, but this solution is there for the people looking to get this achievement with the minimum of fuss.
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15 Nov 2013 21:22

10 Comments
Thumbs up from me! Thank you!
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By Dan vasNormandy on 19 Jan 2014 19:45
great guide worked perfect
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By on 13 Jul 2014 05:39
great guide
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By LRD SOTH on 16 Jan 2015 15:40
What moron downvoted this? I'm not sure you could ask for a cleaner, crisper, and more immediate solution. Glad this was here after I didn't have the chievo when I completed the DLC.
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By Cellar Attic on 19 Feb 2015 12:47
I guess the solution didn't work for the 2 negatives. Glad it helped you guys out though.
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By LEGENDXKILLA#250 on 24 Feb 2015 18:39
Great guide, but you need to fix something minor. You actually should load the second to last level, called Housewares.
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By HyacinthHouse71 on 20 Mar 2015 17:38
+1 for a great guide! Clean, crisp(y)... [sorry... microwave joke...] roll
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By steveRPGmr on 16 Sep 2015 00:23
@HyancinthHouse71 - I have updated the solution, thanks for the feedback.
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By LEGENDXKILLA#250 on 03 Oct 2015 20:49
+131 seems right. Two fools downvoted this. I'll never understand TA...
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By JohnnyInterfnk on 02 Oct 2017 00:39
I would like to add that if you miss this point like me...no worries...a few minutes later you will have another perfect place. You will see SHOWROOM written over the door with a vending machine beside...you have a checkpoint right here so refill your radar range with only $16 and when you get inside the room you will see 3 and sometimes 4 splicers together...kill them and reload checkpoint ;)
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By Dan vasNormandy on 19 Jan 2014 20:28
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The Radar Range is found

You must shoot an enemy with the Radar Range until the he/she glows red and explodes. Make sure enemies are fairly close you do this and you may want to upgrade the weapon at a Vending Machine to bulk up the power. Also note these are cumulative.

If like me you didn't get enough in the first playthrough go to burial at sea & load chapter 'Housewares'.
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12 Nov 2013 16:06

4 Comments
Should note the code is 3958 to get the Radar Range gun in the Bistro down stairs.
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By A Batwoman on 12 Nov 2013 22:23
It's already listed as that laugh
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By Triple G Andy on 13 Nov 2013 00:03
Never saw it. roll
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By A Batwoman on 13 Nov 2013 06:00
No worries mate =]
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By Triple G Andy on 13 Nov 2013 11:10
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This achievement is easier than it may seem. Try to have to group of splicers follow you around so you can be sure to rack up multiple chain kills in one shot. When you see individual splicers, try to run around to find more and they will follow you, then just hold RT on one and watch the fireworks. The Radar Range has a fairly large blast radius, so as long as you have a group of splicers following you, you should have no problem in chaining them. I also found that the burst can pass through objects, so if a splicer is taking cover they will still be annihilated by the blast.

The code for the door to radar range is 3958, which is found in an audio diary.
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12 Nov 2013 16:22

3 Comments
Minor edit: RT, not LT. wink
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By ZeroThreshold on 13 Nov 2013 01:25
Thanks, I hadn't noticed.
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By Yazite on 13 Nov 2013 10:26
An added note about this, there is an item you can pick up from the Bridal shop, I believe, which is a shirt that will make your enemies have elemental effects happen when shot (burn, freeze, etc.). Equip that shirt and then find groups of enemies and use the Radar Range. I was able to make one explode, which would turn the others to ice and thus explode as well. I had this achievement done well before the final fight in part one because of wearing that shirt with use of the Radar Range.
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By Broon43 on 28 Nov 2013 01:55
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Note: The Radar Range itself is missable, see the Note in Cook and Serve for more details.

For this trophy, you have to use the Radar Range on an enemy that is close enough to other enemies to cause damage to them when he/she explodes. They only need to take damage for this to count (they don't have to be killed by it). You do not have to damage 15 enemies at once, just 15 total over the course of the DLC. The counter for this trophy is cumulative so you can use Chapter Select to get it if you miss out in your initial playthrough.

If you are having trouble with this one then consider purchasing the "Accelerator Mod" as it increases the damage of the Radar Range by 25%. Using Bucking Bronco can also help with this and the two upgrades for that go even further to aid you. For the location of Bucking Bronco, see the General Tips and Item Locations post below: LINK

A great place to farm this one is in the Appliances area. You get there by going through the Bookstore and through a door labelled "Showroom", which requires a Hairpin lock. Once you enter the room, take the left set of stairs. Once you reach the bottom, you should be able to see a Decoy tear across the room. Open that up and move to it, and about 6 enemies will have gathered near it. Fire away with your Radar Range and you should take them all out. Entering the Appliances room for the first time triggers an Autosave, which will put you right back at the entrance when you reload the checkpoint.

An alternative method has been submitted by MrBeens:

A really easy way to get the Chain Reaction trophy is right when you get the Radar Range itself. Close the vent right next to the room with the Radar Range. This will trigger an Autosave. Now just go pick up the Radar Range and three enemies will spawn. Take them out with a Radar explosion, then pick 'Restart Checkpoint' from the menu. You will start over at the vent right before the Radar Range and your explosion kills will continue to accumulate, it takes about 5 minutes to get the trophy this way.

The ammo for this gun depletes quickly but you can buy more at a Circus of Values vending machine: 300 rounds for $8. The Circus of Values machines are standalone vending machines with an illustration of a clown on the front. This machine also talks and laughs so you will probably hear it before you see it.

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see the Cookand Serve trophy hint
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29 Sep 2014 11:10

2 Comments
Even if, after receiving a weapon, you kill everyone in a row only with it, you will not get slicers for the trophy. So, reload from the checkpoint, as it will take too long to replay the chapter after the end of the expansion.
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By Smocker on 18 Mar 2015 11:30
Enemies will respawn, Radar Range charges can be purchased at the Vending Machine. No checkpoint downloads are needed.
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By reviva1 on 14 Feb 2020 21:34
Video guide: https://www.youtube.com/watch?v=YzRt3X8y8Lc
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30 Jan 2014 10:32