Full list of all 73 The Backrooms: Survival achievements.
The base game contains 61 achievements, and there are 3 DLC packs containing 12 achievements.
Obtain an Air Rifle or Air Pistol
Find the "safe level"
Consume any Lucky o' Milk variant
Repair a weapon
Consume 25 Food
Use a shot of adrenaline
Drink 25 liquids
Obtain a crossbow
See a skin stealer transform
Upgrade a weapon
Encounter a death moth!
Reach Level 10
Find a nailgun
Buy an item from a friendly entity
Eat a protein bar
Consume a painkiller
Drink "Super Almond Water"
Collect 10 Backcoins
Sell an item
Consume Axolotl water
Consume HNT Backrooms-Carpet flavoured crisps
Find a crafting blueprint
Equip body armor
Use a vending machine
This new achievement will be available in the next update!
Find the "City"
Discover the "Castle" levels
Cure yourself from poison
Unlock a "big chest"
Drink a "Dubious Liquid"
Obtain almond water
Surviving being set ablaze
Kill any entity with a weapon
Stop yourself from bleeding
Unlock a locked door
Enter the "negative" levels
Find the "Torture Rooms"
Reach Level 5
Reach Level 3
Find "Level FUN"
Use a sanity pill
Unlock and climb through an air vent
Unlock a safe
Encounter a hound
Return to a previous level
Find the "Greek labyrinth" level
Find a television
Find the "Poolrooms" level
Find a stuffed toy
Find a telephone
Encounter a smiler
Survive being chased by an entity
Reach Level 1
Craft an item
Kill "Santa"...
Drink 50 Liquids
Consume 50 Food
Enchant a weapon with an elemental effect
Get drunk!
Use a teleportation gem
Headshot an entity
Obtain a modern firearm
Bestow the haste effect on yourself
Obtain a weapon with the rare affinity
Obtain a weapon with the heavy affinity
Obtain a weapon with the critical affinity
Obtain a weapon with the special affinity
Obtain a weapon with the legendary affinity