The PlayStation Portable (PSP) hardware production ended globally around 2014.

2. Fan-Made Android Projects Built in Unity or Unreal Engine

An uncompressed, vanilla version of GTA 5 requires roughly 60 to 100 GB of data depending on the platform. Fitting the map of San Andreas, thousands of audio files, and high-fidelity physics logic into a 1.8 GB UMD limit is mathematically impossible without stripping away the entire identity of the game. 4. How to Safely Play GTA on Handhelds Today

You're looking for a useful paper related to PSPISO Club GTA 5 2021. I'm assuming you're referring to a research paper or an academic article. After conducting a search, I found a few papers that might be relevant:

Even though the PPSSPP emulator on a modern Android phone is very powerful, it can only emulate PSP hardware, not PS3 hardware. 3. What Was the "Pspiso Club GTA 5 2021" File?

What are you using (e.g., original PSP, PS Vita, Steam Deck, or Android)?

You don't need a fake PSP file to play GTA 5 on the go. The game has seen official releases on several powerful portable platforms: