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