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