Here is the full list of all 42 Killing Room achievements.
Pick up 100 medkits.
Take 50 items.
Cover otherwise deadly hit.
Complete 250 rooms.
Solve puzzle in last 5 seconds of countdown.
Open 10 coffins.
Kill 1000 enemies.
Max your Accuracy stat.
Kill Duna Boss.
Max your Health stat.
Take 10 rare items.
Kill 10 boss creatures.
Save 5 ducklings.
Die 10 times.
Kill 500 enemies
Take 20 items.
Take 5 legendary items.
Pick up 20 medkits.
Take 3 legendary items.
Kill yourself in Suicide Booth.
Complete 25 rooms.
Take 5 rare items.
Kill enemy while being trapped in Bear Trap.
Kill 2000 enemies.
Die 50 times.
Finish the game with at least 10 Trouble items in inventory.
Win Killing Room.
Win Killing Room 5 times.
Save 20 ducklings.
Solve 10 puzzles.
Solve 50 puzzles.
Open 50 coffins.
Max your Damage stat.
Max your Stamina stat.
Max your Magazine stat.
Max your Speed stat.
Complete 1000 rooms.
Kill 50 boss creatures.
Kill 5 ducklings.
Kill 20 ducklings.
Get one item from real viewers.
Win game on Hard mode.