Here is the full list of all 42 Killing Room achievements.
Kill 50 boss creatures.
Die 50 times.
Pick up 100 medkits.
Kill 2000 enemies.
Max your Health stat.
Max your Magazine stat.
Save 5 ducklings.
Complete 250 rooms.
Solve puzzle in last 5 seconds of countdown.
Kill 1000 enemies.
Take 50 items.
Kill 10 boss creatures.
Kill Duna Boss.
Kill 500 enemies
Pick up 20 medkits.
Die 10 times.
Max your Accuracy stat.
Take 10 rare items.
Take 20 items.
Take 5 rare items.
Take 5 legendary items.
Complete 25 rooms.
Take 3 legendary items.
Kill enemy while being trapped in Bear Trap.
Cover otherwise deadly hit.
Kill yourself in Suicide Booth.
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 10 coffins.
Open 50 coffins.
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.