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