The anthology includes several built-in "cheats" that are earned through gameplay:
To unlock gallery items faster, you can exploit the save system in Metal Slug 3 difficulty (you can use infinite credits). Save the game immediately after defeating the final boss. Metal Slug Anthology Psp Cheat Codes
You can quickly earn tokens to unlock everything in the gallery by using this save-load trick: The anthology includes several built-in "cheats" that are
Codes were tested on UMD version 1.0 and PSN digital release. Emulators may have different input lag – enter codes slower if needed. Metal Slug Anthology Psp Cheat Codes
If you just want to breeze through Metal Slug Anthology , focus on the code at the start of each credit. For practice, use the Combat School mode in MS5/6 – no cheats needed but it teaches advanced tactics.