Escape via the helicopter

Escape via the liferaft

Escape via the sub

Win the game against the Brute

Win the game against the Hunter

Win the game against the Fiend

Stun a monster with the fire extinguisher

Trigger a Hunter trap with an item

Activate the main steam valve

Hit the Brute with a flare

Power 2 additional areas in one playthrough

Gain access to a barricaded room

Get killed by all 3 monsters

Lock a monster in a power-locked room.

Get killed by a monster after falling on a pit trap

Have 6 glowsticks at once.