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