Co-op games you can play with friends in your browser
15 games · Updated October 8, 2026 · Most played first
These games let you team up with friends in a browser tab. Survive the Night is a co-op zombie FPS for 16 players, and Gravecrawl and We Die Below are dungeon games for up to four.
Halo: Combat Evolved has co-op in the browser if you bring your own disc image. UP! with a stranger ties two blobs together for co-op with a stranger, and Space Blast is couch co-op.
These include fan games and ports, made by fans and hosted on their own sites. They aren't official, and the owners of the original series don't make or endorse them.
#1 on this list
Halo: Combat Evolved (Browser)
Halo CE in WebAssembly, co-op included; bring your own disc image
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Halo: Combat Evolved (Browser)
Halo CE in WebAssembly, co-op included; bring your own disc image
Mashup Multiplayer212 clicks - 2
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Halo CE Mobile
Halo CE on your phone with online co-op; bring your own disc image
Mashup Phone-friendly Multiplayer30 clicks - 4
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UP! with a stranger
Two blobs tied together, co-op with a stranger
Original Phone-friendly Multiplayer6 clicks - 8
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Zelda II Reconstruction
Zelda II rebuilt in Rust, co-op included; bring your own ROM
Mashup Multiplayer2 clicks - 11
The Thirteenth Guest
3D hotel mystery, solo or with a friend
Original Phone-friendly Multiplayer1 click - 12
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Questions
- How many players can join?
- It depends on the game. Survive the Night takes up to 16, Gravecrawl, We Die Below and Der Koloss up to four, and UP! with a stranger two.
- Are these games free?
- Yes. Every game here plays free in a browser tab. A few show ads or sell extras on their own sites.
- Can I play them on a phone?
- Games marked Phone-friendly have touch controls. The rest need a keyboard, so they're best on a computer.