Blastmates is a free, open-source multiplayer bomb-arena game that runs in the browser. Share a room link and up to 8 friends jump in. No download, no account, no launcher. Drop bombs, blow up bricks, be the last one standing. Works on desktop and mobile, with bots to fill empty slots and sudden death to keep rounds short. Built solo with Claude Code. Full source on GitHub, so fork it, self-host it, break it.