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