Metal Slug 3 Cheat Codes for XBox

Unlock Levels
Finish the entire game to enable the Storming the Mothership amd Chubby Isle Paradiso levels.
submitted by: Michael

Completion bonuses:
Successfully complete and save the game under the normal difficulty setting to unlock the "Chubby Isle Paradiso" (Fat Island) and "Storming The Mothership" (UFO) options at the main menu.

Cure zombie or mummy status
To turn back from a zombie to a human, use the Med-Kit item found in enemies or boxes. To turn back from a mummy to a human, find the bottle of Holy Water found in enemies or boxes.

Helper monkey
Throughout the game you will find a wooden crate containing a monkey wielding a gun who will help you fight enemies. Note: Do not rely on the monkey helping all the time. Sometimes he will stop to pick his nose and do other things.

Continue Trick
When your down to your last life on arcade mode press start on controller 2. This starts you off on player 2's controller when your in a tough spot, giving 3-5 new men. This is helpful for Mission 5 or some of the harder bosses. If you're quick enough you can die on the player 1 controller and press start on controller 2 and still continue. The only flaw to this is you wont be able to select the same character you had as player 1.