Konami did issue an statement for no cheats. however still works today on emu and psp

The Peace Walker 60 FPS Revolution had achieved its goal, and PsychoMantis was hailed as a pioneer in the gaming community. The incident also sparked a renewed conversation about the role of community-driven development and the importance of engaging with gamers.

One of the gamers, a skilled hacker named "PsychoMantis," claimed to have stumbled upon a mysterious cheat code that could unlock the game's full potential. The code, which he shared with the group, was a series of complex button combinations and memory addresses that supposedly tweaked the game's internal settings.