Bash Fighter is a browser-based platform fighter supporting up to 20 players in one match, playable directly at https://bashfighter.com/ with no download or account. It's licensed AGPL-3.0 and open to contributions; source is at https://github.com/Bash-Entertainment/bash-fighter. It's early/pre-1.0, built with a deterministic fixed-tick sim and a PixiJS renderer. Feedback and PRs welcome.