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