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