Co-op games like Acatalepsy
Below are 8 cooperative Steam games similar to Acatalepsy, 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 Acatalepsy page.
Ranked picks
- 1
Simulacre
Online Co-op alternative to Acatalepsy — playable with friends. Shares Indie and Early Access with Acatalepsy.
Simulacre is a cooperative horror game about exploration, survival, and distrust. You find yourself in strange places where each new level follows its own rules, changes familiar conditions, and forces the team to find a way forward.
- 2
Mournight
Online Co-op alternative to Acatalepsy — playable with friends. Shares Indie and Adventure with Acatalepsy.
A terrifying 1–4 player co-op horror game set in a cursed mansion. Use flashlights, find clues, and survive the horrors within. Every decision matters. Can you escape before the curse claims you?
- 3
Backrooms With Friends!
Online Co-op alternative to Acatalepsy — playable with friends. Shares Adventure and Early Access with Acatalepsy.
A 1-5 player co-op horror game where you and your friends noclip into an endless maze also known as the Backrooms. Explore procedurally generated levels and avoid the Entities that stalk the halls. Get separated and you might not make it back. Get caught and you won't make it out at all...
- 4
This Side (Early Access Game)
Online Co-op alternative to Acatalepsy — playable with friends. Shares Indie and Adventure with Acatalepsy.
Fight your natural fears and help your friend to find a way to escape this forgotten place. Set on an abandoned mine. This Side is a roguelike survival horror game that you will have a terrifying experience with a friend to find the way to freedom.
- 5
Descent Into Darkness
Online Co-op alternative to Acatalepsy — playable with friends. Shares Indie and Adventure with Acatalepsy.
In "Descent Into Darkness", you must take an elevator down into the depths of a mysterious underground complex, filled with dangers and secrets. Your goal is to find a way out—but with each level, the darkness grows, and the threats become more terrifying...
- 6
Whisper Of The Curse
Online Co-op alternative to Acatalepsy — playable with friends. Shares Indie and Early Access with Acatalepsy.
"Whisper of the Curse" is a 4-player online co-op psychological horror game where you and your team will perform various rituals and spells to eliminate the curse and fend off cursed entities. At the same time, you'll need to avoid being hunted by these malevolent entities.
- 7
Devil of the Plague
Online Co-op alternative to Acatalepsy — playable with friends. Shares Indie and Adventure with Acatalepsy.
A 1–4 player co-op horror game. Cleanse cursed lands, perform forbidden rituals, and survive a spreading plague. Fear is not scripted. It emerges from your choices, your mistakes, and your team.
- 8
The Devourer: Hunted Souls
Online Co-op alternative to Acatalepsy — playable with friends. Shares Indie and Adventure with Acatalepsy.
Play as a paranormal investigator in our hybrid between first person survival and psychological horror story game. Investigate a haunted forest with up to 5 players CO-OP, try to lift the curse, experience a tragic story and take decisions together. Will you survive or will you lose your soul?