was announced for the PSP at E3 2009, it was eventually cancelled or evolved into Resident Evil: Revelations for the 3DS. 2. Beware of "Highly Compressed" Downloads
If you want RE4 portably but not on original PSP hardware:
: While you can't play Resident Evil 4 natively on a PSP, the handheld can perfectly run PlayStation 1 Eboots of the original trilogy ( Resident Evil 1, 2, and 3: Nemesis ) via custom firmware. Best Options for Portable Play
The PC version is ~15GB, and modern remakes are ~67GB.