Full list of all 16 Monstrum achievements worth 1,000 gamerscore.
Get killed by all 3 monsters
Stun a monster with the fire extinguisher
Gain access to a barricaded room
Trigger a Hunter trap with an item
Escape via helicopter
Win the game against the Hunter
Escape via the life raft
Power 2 additional areas in one playthrough
Activate the main steam valve
Hit the Brute with a flare
Have 6 glowsticks at once.
Get killed by a monster after falling on a pit trap
Lock a monster in a power-locked room.
Escape via the sub.
Win the game against the Brute.
Win the game against the Fiend.