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