Choose your difficulty level (be a wimp, a tough guy, or a superhero) and character (both players can be the same one in a two player game) and then review the mission briefing. Make sure you know your mission objectives and the threat assessment before leaping into battle.

Both Iron Man and X-O pack a lot of firepower in their metal suits. From an ion cannon to repulsor rays, there is plenty in their arsenals to stop the hordes of bad guys. Along the way, they can pick up power-ups and become even stronger. Each character also has an energy meter which is depleted with each injury; once it reaches zero, the player loses a life. When all the lives are gone, the game is over unless the player picked up a continue power-up.