Co-op games like Backrooms Lost Unit
Below are 8 cooperative Steam games similar to Backrooms Lost Unit, ranked by player overlap and content similarity. Every pick supports cooperative play — online co-op, LAN co-op, or shared/split-screen — so you can play with friends right out of the box. imho.run pulls from the same Steam category data Valve uses internally, so "Co-op" here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Backrooms Lost Unit page.
Ranked picks
- 1
Obscuris
Online Co-op alternative to Backrooms Lost Unit — playable with friends. Shares Action and Casual with Backrooms Lost Unit.
Co-op horror for 1–6 players set in modern Japan. Play as Japanese high school girls, explore eerie locations (some procedurally generated), collect Obscure at night, meet deadly quotas, and escape before dawn. Customize your character. Story mode not yet available.
- 2
Long Carnage
Online Co-op alternative to Backrooms Lost Unit — playable with friends. Shares Action and Early Access with Backrooms Lost Unit.
Long Carnage is a first-person cooperative horror game for up to 4 players. Explore an isolated house, find resources, restore power, and survive unique killers with their own mechanics in dynamic and unpredictable matches.
- 3
7 Days to Escape
Online Co-op alternative to Backrooms Lost Unit — playable with friends. Shares Action with Backrooms Lost Unit.
OBEY OR ESCAPE You can follow the rules and survive another day.You are a defective clone trapped inside a brutal prison where every day follows a strict routine. Play alone or with up to 4 players as you obey the guards, complete your shifts, stay in order, and avoid suspicion.
- 4
Backrooms Society
Online Co-op alternative to Backrooms Lost Unit — playable with friends. Shares Action and Early Access with Backrooms Lost Unit.
Backrooms Society is a 1-8 player co-op horror game. Make your way through unique levels of the backrooms while trying to survive and avoid mysterious entities. Scavenge each level for gear and resources, bring it back to The Hub where you can sell valuables and buy/craft new gear.
- 5
Red Core Division
Online Co-op alternative to Backrooms Lost Unit — playable with friends. Shares Action and Early Access with Backrooms Lost Unit.
Red Core Division is a co-op survival horror game for 1–4 players. Enter a classified containment facility, where something has gone horribly wrong. Your mission: find evidence of paranormal activity, complete high-risk objectives, and escape alive. But, something is down there—something that hunts.
- 6
HALLS
Online Co-op alternative to Backrooms Lost Unit — playable with friends. Shares Action and Casual with Backrooms Lost Unit.
HALLS is a co-op survival horror game set in a liminal space for 1-6 players. You end up stranded inside of the backrooms. Explore to gather resources, protect your base and craft gear to hunt giant bosses. Will you be able to find a way out of this space in between worlds?
- 7
Backrooms: Escape Together
Online Co-op alternative to Backrooms Lost Unit — playable with friends. Shares Action and Casual with Backrooms Lost Unit.
A visually lifelike co-op horror for 1-6 people. Journey through 10 procedurally generated levels, using what's available to survive and progress deeper into the Backrooms.
- 8
Backrooms: Extractions
Online Co-op alternative to Backrooms Lost Unit — playable with friends. Shares Action and Casual with Backrooms Lost Unit.
Cooperate with up to 6 players to explore, search, and extract lost agents within the Backrooms. Solve puzzles, unlock tools, survive against entities, and progress through increasingly dangerous levels.