| Achievement | How to unlock
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| Barricade Enter | Get access to a barricaded room.
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| Brute Escape | Complete the game with the Brute enabled.
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| Fiend Escape | Complete the game with the Fiend enabled.
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| Fire Extinguisher | Blast a monster with the fire extinguisher.
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| Flare gun Brute | Shoot the brute with the flare gun.
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| Glowsticks | Have 6 glowsticks at once.
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| Helicopter Escape | Escape the ship via the helicopter.
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| Hunter Escape | Complete the game with the Hunter enabled.
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| Hunter Item Trap | Trigger the Hunter pods with an item.
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| Liferaft Escape | Escape the ship via the liferaft.
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| Main Steam Valve | Activate the main steam valve.
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| Monster deaths | Get killed by all 3 monsters.
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| Monster Pitfall Kill | Get killed by a monster after falling on a pit trap.
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| Monster Trap | Trap a monster in a locked room.
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| Power Fuseboxes | Power 2 fuseboxes in one playthrough.
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| Submarine Escape | Escape the ship via the submarine.
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