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