Defend the planet from waves of invaders. Kill all your enemies, pick up bonuses, upgrade your tank, unlock new types of guns to deal with the 8 end-level bosses throughout the game.
Blow apart big waves of zombies using an array of guns and hired buddies to fight by your side. Purchase bigger and better guns and hire assistance with big firepower to give those hoards of zombies a good spanking, keeping them away of your territory.
John, you're back into action! A druglord from New York has taken control of important mexican top-secret documents and he's blackmailing the mexican government in exchange of military weapons. Eliminate all resistance and get those documents back!
Take control of a micro tank and destroy your opponent by shooting bouncing cannonballs. Take the challenge and try to win all increasingly difficult levels.
Configure your Mech and go to battle! Collect the special diamonds discovered on Mars and bring them back to base. Watch out for evil aliens or better yet, blast them back to where they came from!