PLEASE NOTE: We take no responsibility for any changes you make to your hardware, software, drivers or O/S as a result of the cheats listed here. Only a few of the cheats listed have been tested and we cannot guarantee any of them will work. If you come across a bad/non-working cheat, please let us know and we will remove it.

Hard mode
Beat the game to unlock hard mode.
Fire Missiles Faster
With the first gun equipped, rapidly press Y + A. As soon as the missile fires, the gun will switch back to beam weapon mode, but when you press Y again, it fires another missile. This can take down enemies in a shorter time, preventing them from having more attacks on you.
Original Nes Version
NOTE: Requires Metroid Fusion, the Game Boy Advance and a link cable.
Beat Metroid Fusion and save the game. Connect both games with the link cable to unlock the classic NES version of Metroid.
Unlock Image Gallery's
#1 - Scan 50% of the Creature & research data.
#2 - Scan 100% everything.
#3 - Collect 100% all items.
#4 - Finish the game on Hard mode.