Unlock Desktops 2 and Special Music: On the Hard difficulty setting with limited continues complete ALL 7 Metal Slug games. Unlockables Unlock Desktops 1: On the Normal difficulty setting with limited continues complete ALL 7 Metal Slug games. Get the latest cheats, codes, unlockables, hints, Easter eggs, glitches, tips, tricks, hacks, downloads, hints, guides, FAQs, and walkthroughs for Metal Slug Anthology on PSP. For Metal Slug Anthology on the PSP, GameFAQs has 4 cheat codes and secrets.
