This is where cheat codes enter the fray. While Metal Slug Anthology does not have a traditional "menu" for cheats, the PSP version retains the classic button combo input systems from the arcade originals. By inputting specific sequences on the D-Pad, analog stick, and face buttons, you can unlock infinite continues, select any mission, turn enemies into flamingos, or even raise the dead.

Below are the most reliable CWCheat codes for the US version of Metal Slug Anthology (ULUS-10204). How to Add These Codes Connect your PSP to a computer via USB.

The first code they tried was the "Infinite Continues" code: Up, Down, Left, Right, X, Square, Circle, Triangle. They entered it in, and to their surprise, it worked! They could now continue playing from where they left off, even if they died.

The Ultimate Guide to Metal Slug Anthology PSP Cheat Codes and Unlockables Master the Arcade Classic on Your Handheld

For 95% of these codes, you must be on the title screen (the screen showing the game’s logo and "Push Start") or the region select screen . You are not entering these mid-game. You will hear a confirmation sound (a chime or explosion) if successful.

: In the Combat School mode, accumulate 1,000 points . Your character will gain a greenish skin tint for subsequent runs.