Metal Slug Anthology for the PSP doesn't feature traditional built-in cheat codes (like those found in older console versions). Instead, players typically rely on CWCheat or TempAR on custom firmware (CFW) to modify game values. Cheat Engine / CWCheat (For CFW Users)
Final Pro Tip: The best cheat of all? Co-op. Find a friend with a PSP, turn on Ad-Hoc mode, and share your continues. Two soldiers bleed slower than one. Metal Slug Anthology Psp Cheats
Memory Stick / Save Editors (for homebrew-enabled PSP) Metal Slug Anthology for the PSP doesn't feature
Defeat the final boss. Just as the boss is destroyed (while it is still "exploding"), quickly save your game. turn on Ad-Hoc mode
Many players complain that the codes don’t work. Here is why: