The objective of the game is for the player to shoot down robots and take control of them. Once the player has taken control of the robot, he/she has the robot's weapons and upgrades. The player can take control of many different types of robots. The player must rescue all the civilians in order to proceed to the next stage. The game has a two player cooperative mode. Throughout the game, the player moves his way shooting a robots, aliens, mutants and huge vehicles that tries to impede the player's progress. There is a total of 9 robots the player can take control of, each with different abilities and weapons.