Metal Slug Anthology on the PSP contains a wealth of hidden features and content, including:

If you are playing on a PSP with custom firmware (CFW) or using an emulator like , you can use CWCheat files ( ULUS-10154 ) to enable traditional cheats.

Metal Slug 3 has the most robust cheat system on the Anthology disc.

If you prefer to earn your victories legitimately, keep these fundamental Metal Slug mechanics in mind to stretch your lives further:

Learn the enemy patterns. The games are designed to be memorized, not just blasted through.

Play Metal Slug 3 or 5 on Hard mode. When you defeat the final boss, save the game immediately as they explode. Let the credits roll to receive your 5 tokens, then exit to the main menu. Reload that same save to instantly trigger the ending again, earning another 5 tokens each time you repeat the process. 3. CWCheats for PSP/PPSSPP

To gain advantages like infinite ammo or invincibility, players must rely on standard in-game unlockables, developer-intended game options, or third-party modification tools. 1. Built-In Game Settings & "Cheats"

Complete specific games within the anthology to unlock specialized Slugs in the options menu. 2. How to Make the Game Easier (No Codes Needed)