Gran Turismo 4 cheat codes have finally been discovered after nearly 20 years

But how were they even found in the first place?

In-game cheat codes have been discovered for Gran Turismo 4 almost

Best Gran Turismo 4 Posts - Reddit

Gran Turismo (PlayStation Portable) - The Cutting Room Floor

Gran Turismo 4 Cheats Took 20 Years To Discover

Tutorial - PCSX2 Setup + GameFix + TextureMod

Gran Turismo 4 codes discovered nearly 20 years later - Xfire

Best Gran Turismo 4 Posts - Reddit

The person that discovered these is the real mvp #greenscreen

Gran Turismo 4 Cheat Codes Discovered Nearly 20 Years After

iRacing Rolls Out Massive Season 4 2023 Update