Playing games with friends makes everything more fun. The problem is coordinating everyone to download the same game, create accounts, and find each other takes more effort than the game is often worth. Browser multiplayer games solve this — share a link, your friend opens it, and you're playing together in seconds.
Paper.io 2
Paper.io 2 is a territory-claiming game that works brilliantly as a quick competitive session. Everyone plays as a colored square trying to claim as much of the map as possible by looping back to their existing territory. You can eliminate other players by cutting through their exposed trail. Simple to explain but develops real strategy as the map fills up.
1v1.LOL
1v1.LOL is the best direct-competition browser game available. You build structures and battle your opponent in a format inspired by Fortnite's building mechanics. The game has a practice mode, ranked matches, and custom games where you can invite a friend directly. The skill ceiling is surprisingly high.
Basketball Stars
Basketball Stars supports two-player local multiplayer on the same keyboard. One player uses arrow keys, the other uses WASD. Close matches, buzzer beaters, and ridiculous trick shots all make for genuinely memorable moments that get loud quickly.
Fireboy and Watergirl
Fireboy and Watergirl is cooperative local multiplayer at its best. Two players share a keyboard — one controls Fireboy with arrow keys, the other controls Watergirl with WASD — and you solve puzzles that require both characters in different places at once. Neither player can finish the level alone, which forces genuine communication and coordination.
Krunker.io
Krunker.io is a first-person shooter that runs remarkably smoothly in the browser. It has multiple game modes, weapon classes, a leveling system, and a surprisingly active competitive scene with tournaments and ranked modes. For a browser game, the depth is extraordinary — there's a custom map editor, weapon skins, and regular updates.
How to Play With Friends
Most browser multiplayer games use either a shared room code system (create a room, share the code, friend enters it to join) or open servers where you're automatically matched with other players. For local multiplayer on the same device, you just need to be in the same room with one computer. The games on this list cover all three formats, so pick based on whether you're playing remotely or in person.