Bash Fighter is a server-authoritative platform fighter that puts up to 20 players in one match, entirely in the browser: no download, no account, works on phones. The sim runs on fixed-point arithmetic so it stays deterministic across clients, and state broadcast is delta-compressed, around 6KB/s per client at full player count. Rendering is PixiJS. Bots fill empty seats so a match always starts within seconds.

Six stages, eight characters, three modes (Last Fighter Standing, Timed Brawl, Stocks) so far. It is AGPL-3.0, source at https://github.com/BashEntertainment/bash-fighter, contributions welcome. Honest caveat: it is early and rough, tuned mostly by our own testing, not a finished game.

Play: https://bashfighter.com/

If you try it, I would like to hear what felt wrong, especially anything about the netcode or the sim - that’s the part with the least outside testing so far.