If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Play through 16 levels, using an array of nine different weapons to blow up, burn and mow down the invading humans. This game also offers the chance to play alongside allies, creating small but hectic battlefields. An original feature is the partially destructible environment, which will require tactical thinking to use effectively.
WASD to move. mouse to aim and shoot.