The Callisto Protocol

The Callisto Protocol

47 Achievements

1750 XP

Epic
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Bear Trap

Bear Trap

Kill a Two-Head with a Hazard

20 XP

0.1%

How to unlock the Bear Trap achievement in The Callisto Protocol - Definitive Guide

There are at least four waves that spawn Two-Heads but the easiest one to attempt this is on wave 9 as the other waves add additional enemies that get in the way while in wave 9 the Two-Head is the only enemy to worry about.

From the starting point, head left through a door that says Cell Block then up the stairs facing the entrance. Turn right at the top and then go through the door marked Access Hall S121, then follow the path leading to the cafeteria. Inside this room are two large fans which count as “hazards”. I’d recommend using the one on the right wall as the other fan has tables that can get in the way.

When Two-Head spawns you’ll want to get him over to the fan and then position yourself to where you’re facing him while his back is to the fan. The way to do this is to keep moving forward into him which prevents him from making any forward movement, although he can still attack. When Two-Head is close enough to the fan he will die instantly
and you’ll unlock the achievement.

I should also mention that you can use the riot gun and stun baton to turn the Two-Head into one but it’s better to save the ammo.
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24 May 2023 03:55

7 Comments
Three time i've kill it with the fan and still no achievement. :/
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By WhiterValkyrie on 24 May 2023 15:57
Surprisingly, I got this by activating the rotating spiked pillars in one of the hallways. Just randomly did the activation and here comes the Two-Head, whacked the crap out of it with the Stun Baton and shot at the legs and head with whatever guns I had. Froze the thing up enough where it got sliced and diced. The Two-Head is slow and dumb enough that you can lure it into any trap n problem.
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By KenjiMania on 24 May 2023 17:01
ya have also killed the last two head in the campaign with the fan a few times now. probably tied to the riot bundle itself
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By ZeroAccuracy on 24 May 2023 23:45
Can confirm the fan method works, that's what I did. Another, probably easier/guaranteed menthod is LostTemplar62's method of the power core in the traps. There is a door at the top of the arena that is kept open with a power core, if you want a free battery and a room with a fan and the trap that can kill a two-head, that room is your best bet.

Power cores also get more expensive the higher the wave, just like health injectors and grp batteries.

In the wave 50 solution the creator mentions that boosts could be bugging achievements and not unlocking them so that could be why the fan method isn't triggering the achievement for people.
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By xDAKx on 27 May 2023 06:19
I couldn't get the achievement with the fans, unlocked first try with a fuse based trap.
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By deluxnugs on 22 Jul 2023 18:16
There is still a glitch if you pop rampage mode that will lock you out of this. I popped it today making sure I didn't use rampage mode.
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By Radgeta on 12 Nov 2023 04:27
I tried the fan method twice but it didn't work. However I used the moving spike trap near the starting area going into the shower to get the achievement. If you want to add this to your solution go ahead

Find or purchase a power core (the location for the power core is pass the shower down a hallway and to the right next to the Tactical pistol box) it costs 350 CC. Then on round 10 Two-Head spawns run back to the starting area going into the shower place the power core and wait for Two-Head to get crush or simply do the dodge his attacks to make him back up into the trap and the achievement will pop once he is dead thus ending the round.
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By LostTemplar62 on 26 May 2023 02:49
View all 7 comments Show less comments
At the location you can find two power blocks (or buy near the pistol upgrade between the medical block and the large location, you will still have to hold on to 50 waves, so we do it at our discretion) , which open the doors. We take one of them and take it to any trap. We wait for the 10th or 20th wave (so as not to survive for a long time) and when a 2-headed one appears, we use it, trying to kill it with a trap. It won't work to push it onto the fans. It is necessary to kill with an activated trap. They pushed me into the fan and didn’t give me the trophy.
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23 May 2023 22:10

1 Comment
pushed the two-headed one into a large fan and the trophy fell out.
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By vanya_nhk on 23 May 2023 23:32