Karnage.io is one of the best shooter io games in my opinion. You play as a block-type character, on a map surrounded by lava. It's a big battle between all of the connected players.
To play, you can move around with WASD, and you can fire your weapon with left click.
The official ioGround proxy is a Chrome Extension that can be used to unblock Karnage.io so you can play at school or work. The proxy is similar to a VPN extension except it's optimized for unblocking .io games and only works on ioground.com. Click the green button below to add it to Chrome.Add to Chrome