by RegenStudio show that the PSP is capable of running impressive fan-made sandboxes that capture the "creative spirit" of GMod.
Running Garry's Mod (GMod) on a PlayStation Portable (PSP) is limited to basic, low-RAM homebrew clones, as the Source engine is too demanding for the 333 MHz processor. While overclocking to 333 MHz on later PSP models (2000/3000) improves performance, modern alternatives like the Steam Deck or Android clones offer a superior portable experience. gmod psp better
For users seeking the creative or sandbox freedom of GMod, these homebrew projects and official games are widely considered the best alternatives: LameCraft by RegenStudio show that the PSP is capable