Ready Up — what game do we play?Compare two Steam libraries →
Multiplayer games › Horror › Co-op horror

Is Project Unknown multiplayer or co-op?

Yes — co-op. Project Unknown is a co-op horror game released in 2025, 86% positive on Steam (618 reviews), with 42 playing right now. $9.99 on Steam.

Co-opSingle-player tooHorror · Co-op horror

An online co-op horror game featuring unique playable characters and RPG mechanics. Exorcise ghosts using your special abilities and tools while surviving the…

Steam tags: Early Access, Horror, Online Co-Op, Multiplayer, Psychological Horror, Co-op, Survival Horror, Dark

Do you and a friend both own Project Unknown?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Project Unknown is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

Do you and a friend both own Project Unknown?Free, no login — uses public Steam profiles.

Or open the Steam store page.

Games like Project Unknown you can play together

Dead by Daylight
Co-op horror · 79% positive on Steam (797,216 reviews) · 44,886 playing right now
R.E.P.O.
Co-op horror · 97% positive on Steam (185,642 reviews) · 32,349 playing right now
Phasmophobia
Co-op horror · 96% positive on Steam (768,779 reviews) · 9,978 playing right now
Lethal Company
Co-op horror · 97% positive on Steam (487,160 reviews) · 6,199 playing right now
Dying Light
Co-op horror · 95% positive on Steam (457,632 reviews) · 4,953 playing right now
SCP: Secret Laboratory
Co-op horror · 91% positive on Steam (214,309 reviews) · 4,696 playing right now

Tired of Project Unknown? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Project Unknown co-op?
Yes, Project Unknown supports co-op.
Does Project Unknown have PvP?
Steam does not list PvP for Project Unknown.
How many people play Project Unknown?
About 42 players were in-game when this page was built (2026-09-09).

Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; page updated 2026-09-09. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. How the data works · Legal & privacy · All types · Game Pass