Hollow Knight was built using the Unity game engine . The PSP natively does not support Unity, making direct conversions a nightmare.
While the PSP was left out, a dedicated fan project has brought the Knight's journey to Sony's next handheld, the PlayStation Vita. Created by a developer named PatnosDD, this is the most direct way to experience the game on a Sony portable device. hollow knight psp iso updated
To understand the "updated ISO" files found online, you must look at the technical architecture of both the game and the console. Is There an Official ISO? Hollow Knight was built using the Unity game engine