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