Desktops 1:
Finish all seven Metal Slug games on Normal mode and limited continues.
Desktops 2 and Special Music:
Finish all seven Metal Slug games on Hard mode and limited continues.
Art galleries:
To unlock the indicated gallery, finsih the following game.
Art Gallery 1: Finish Metal Slug
Art Gallery 2: Finish Metal Slug 2
Art Gallery 3: Finish Metal Slug X
Art Gallery 4: Finish Metal Slug 3
Art Gallery 5: Finish Metal Slug 4
Art Gallery 6: Finish Metal Slug 5
Art Gallery 7: Finish Metal Slug 6
Unlock Special Music:
Finish Metal Slug 1 through 5 and X on hard difficulty level with limited
number of continues and also clearing Metal Slug 6 with limited continues.
Unlock Tonko Art Gallery:
Finish Metal Slug 1 through 5 and X on easy difficulty level with limited
number of continues and also clearing Metal Slug 6 with limited continues.
Unlimited tokens:
Finish any of the games, then save your game. Every time you reload the
already completed game and go through the ending credits you will get
tokens. On hard mode, you will get 5 tokens.
