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