Retro Game Cheats for Metal Slug Advance (Game Boy Advance)
Effect: Unlock Decoration Card
When:
During the game
How:
You need the "paper thin" card. Turn it on, then complete any mission. With paper thin turned on you will die with just one hit. The easiest way to get the decoration card is to complete mission 2, mainly because there is a Metal Slug at the near start of the level which is shielded, so if you can manage to get through the level with the Metal Slug it shouldn't be as difficult to get the card.
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Effect: Unlock the extra Dungeon mission
When:
During the game
How:
In Mission 5, find and collect the dungeon card. Then complete mission 5 and go to the mission select screen and to the top left there is an extra mission called dungeon.
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Effect: Unlock Prisoner B Card
Effect: Bypass Airplane Level
When:
During the game
How:
After you jump into your plane slug in Mission 5 and go onto the next screen, quickly press up until you're on top of the screen, press left and hold it. Now the enemy planes won't show up on screen and if you hold your position long enough, you will finish the level without encountering any enemies.
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Effect: Unlock Prisoner C Card
Effect: Unlock Prisoner I Card
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