2x PSP (for budget devices) or 3x/4x PSP (for high-end devices).
Open the PSP root directory (the main folder when you open the drive). download 3rd birthday psp highly compressed exclusive
If you are looking to experience this piece of PSP history today, you can find physical copies or play it via digital backwards compatibility. 2x PSP (for budget devices) or 3x/4x PSP