Not Halo
Halo-style multiplayer in a browser tab
Send a friend the link and you're in the same game. Each of these has online multiplayer, from 4v4 shooters to co-op climbs and sword fights.
Who you meet depends on who's online, so an empty lobby is a good excuse to bring a friend.
21 games. Open a card for details, or hit Play to go straight to the game.
Halo-style multiplayer in a browser tab
Multiplayer space dogfighting
4v4 Splatoon-style turf war
8-map multiplayer FPS, proximity chat
Co-op wave roguelike
Multiplayer FPS inside a sphere
PvP arena shooter
Draw a plane, then dogfight in it
Floppy physics fighting
Multiplayer sword fights
You're a Roomba. Clean up, fight back
Cat-and-mouse loot extraction
Toddlers brawl for the TV remote
Rooftop battle royale
Zero-gravity arena shooter
2D racer
Multiplayer ski race
Multiplayer climb up candy-bright peaks
Two blobs tied together, co-op with a stranger
1v1 and 2v2 magic duels
Rust-like multiplayer survival