Nitrome's Bullethead has you facing off against multiple types of enemies as a creature with a gun mounted on its head. You can fight these enemies alongside another player or by yourself. Avoid enemies and their bullets as you try to destroy them and complete each level. Enemies will drop weapon power-ups, shields, and other rewards when destroyed. Some enemies can move along the ground, so you may need to jump to avoid them. Just don't lose all of your lives! If you're playing the co-op mode, you can donate a life to the other player.