BioShock Infinite

BioShock Infinite

80 Achievements

1,695

42-52h

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Twofer

Twofer

Knocked out two or more enemies using the same crossbow bolt.

10

How to unlock the Twofer achievement in BioShock Infinite - Definitive Guide

After collecting the item in the Bathysphere workshop you will have to take a lift to return to the Service Bay entrance in the hub area.

Upon exiting you'll hear a few splicers talking to each other. If you sneak around the corner you should see 3 enemies clumped together, two sat down one stood up.

Shoot the standing one with the Gas Bolt and you're good!
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25 Mar 2014 19:25

7 Comments
Just to add, mine didn't unlock until I dealt with all the enemies in the room (aka the fourth guy out of range of the gas bolt.)
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By Fuchsdh on 26 Mar 2014 00:23
I found it was a bit late too. I actually paused it highlighting the restart checkpoint button till it popped
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By Triple G Andy on 26 Mar 2014 01:56
@Andreka0, haha, pausing and restarting checkpoint ultimately finished the achievement for me. All of the achievements for me so far have unlocked in a delayed fashion...weird
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By Rowdawg88 on 28 Mar 2014 04:43
I got the cheevo in the same spot - but it didn't pop until I started walking around to take out the fourth slicer.
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By SneakyStabbalot on 28 Mar 2014 21:34
For whatever reason, every achievement pop in Burial at Sea Ep. 1 and 2 have taken multiple seconds. I thought it was just me, but I guess not.
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By Trombonafide on 30 Mar 2014 01:44
I had to wait for 56 seconds after killing the 4th guy. I timed it ;)
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By Mattricus on 30 Aug 2014 15:53
best solution. Though just shoot the ground between the two guys sitting and then back off so they don't see you and run away from the gas.
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By Shadow XBL on 02 Sep 2014 04:51
View all 7 comments Show less comments
This video was specifically recorded in the Medical Bay of the Burial at Sea Episode Two DLC but can be obtained t any point after acquiring the Gas Bolt.

The trick is to find a group of enemies close together and fire the bolt on the floor between all of them. You do not want to be seen by the enemy this would cause them to run after you and leave the gas cloud.
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25 Mar 2014 23:52

To get this trophy you must find a group of two or more enemies and knock them both out with the Gas Bolt. The best place to do this is shortly after you first get a gas bolt. You will get the gas bolt after getting the CO2 scrubber in the Service Bay from the main story. After you ascend the elevator you will see a group of splicers close together and talking. Just crouch walk around the corner until you can get a shot in between the enemies. After you shoot them they should all be knocked out and you should get the trophy.

If you would like a video showing how to do this trophy WORLDEATER1 has one for another method in the Medical Bay:

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the trophy is almost plot-driven - the player will more than once find himself in a situation where the path is blocked by a densely packed crowd - with a gas bolt there and the trophy is yours
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02 Apr 2014 09:31

2 Comments
as soon as you get a gas arrow there will immediately be a group of quietly sitting splicers, so do it with them
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By alik on 12 Apr 2014 17:11
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By Stayer on 08 Oct 2017 22:10