Because Hollow Knight was never released on PSP, there is no official disc image (ISO) to rip. The version circulating the community is a "port" created by dedicated modders (notably by developers active on the Sonic Mania PSP port scene). They rewrote parts of the game's code to run on the PSP’s limited hardware.
: You must have a modded PS Vita and own the original game files from Steam or GOG to use the port legally. Guide to Playing Hollow Knight on a Sony Handheld hollow knight psp iso updated
Because Hollow Knight was never released on PSP, there is no official disc image (ISO) to rip. The version circulating the community is a "port" created by dedicated modders (notably by developers active on the Sonic Mania PSP port scene). They rewrote parts of the game's code to run on the PSP’s limited hardware.
: You must have a modded PS Vita and own the original game files from Steam or GOG to use the port legally. Guide to Playing Hollow Knight on a Sony Handheld