Metal Slug Anthology Easter Eggs
Wii | Submitted by TMANSpace Invaders
In mission 4, 5 aliens will be in a formation moving left, right, and down, it is a reference from the classic arcade game Space Invaders.
Metal Slug Anthology Unlockables
Wii | Submitted by GamesRadarUnlock Tonko Art
Beat Metal Slug 6 - on the hard path - with limited continues.