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