Braains2.io is a free-to-play, online, HTML5 zombie survival game. Up to 50 players can join a single server, with one player starting as the zombie and the others as humans. The zombies goal is to infect all of the humans by tagging them, while the humans goal is to survive the entire match without being tagged. The game is played in a top-down perspective, and players can move around the map by clicking and dragging. They can also attack other players by clicking on them. The last player standing wins the match.