Metal slug 3 is the metalist slug out of the metal slug series. In metal slug 3 the slug is the most metal out of the all of other metal slug games. Metal slug 1 or X does not have the slug 3 power that metal slug 3 has, making metal slug 3 the best slug game 3 game. I would love to personally thank user Beinzar for gifting me the most metal game out of the slug 3 metal games.