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