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