When you beat the last boss(When the boss is going up in flames or something like that) save the game very quickly, then wait until the credits start rolling and quit to the main menu. Pass all 7 Metal Slugs on Easy Difficulty / Limited Continues Hidden tricks and features: Easy Tokens: To get tokens easily play through MS3 or MS5 on the hard difficulty with infinite credits if you need them.
*to active cheats on PPSSPP go to Settings, klik System, sroll down and klik Enable Cheats *On PC or Android extract and copy cheats.db file to directory PSP Cheats *To use it play the game then pause and click cheats, click Import from cheat.db *Click cheats again and select cheats what you want *If no cheats list means the game not support cheats features *If cheats not work just restart the game or PPSSPP *Not all cheats work properly and not all game support cheats feature Other Cheats: How to Unlock the Desktops, Special Music, and Tonko Art Gallery.