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