Here is the full list of all 42 Killing Room achievements.
Kill 50 boss creatures.
Pick up 100 medkits.
Kill 2000 enemies.
Kill Duna Boss.
Save 5 ducklings.
Open 10 coffins.
Max your Health stat.
Max your Magazine stat.
Complete 250 rooms.
Kill yourself in Suicide Booth.
Kill 1000 enemies.
Max your Accuracy stat.
Take 50 items.
Kill 10 boss creatures.
Kill 500 enemies
Pick up 20 medkits.
Die 10 times.
Take 20 items.
Kill enemy while being trapped in Bear Trap.
Take 10 rare items.
Take 5 legendary items.
Take 3 legendary items.
Take 5 rare items.
Complete 25 rooms.
Cover otherwise deadly hit.
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.
Max your Damage stat.
Max your Stamina stat.
Max your Speed stat.
Complete 1000 rooms.
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.