"GMod PSP" refers to an unofficial, fan-made homebrew game developed for hacked/modded PSP consoles. It was created by a developer known as xerpi.
The menu popped up. It was compressed, crammed into the small screen. I scrolled to Props. gmod psp
"Okay," I thought. "This is actually kinda cool." What is "GMod PSP"
Because this is not an official commercial release, there are specific requirements to run it and notable limitations compared to the PC version. "Okay," I thought