Sup up your hot rods and hit the roofs for the craziest car ride of your life. Play Car Bumper.io: Roof Battle and take out your road rage at an extremely unsafe height. Race around crazy tracks high up in the sky on top of roofs all over the world as you battle it out with other death-defying racers. Ram into other players as you attempt to knock their vehicles off of the roof. As you knock each one off, your vehicle will grow larger and larger until you’re a towering behemoth. Unlock new arenas, new vehicles, and crazy awesome locations as you play Car Bumper.io: Roof Battle with BlueStacks 4.