Image provided by: Guyfawkesbjohnson has released a port of a PC game called Heretic for the PSP. Here is what he says about his port :
Classic Medievil Action Now for the PSP! Analog stick for movement CHEAT CODES! Sound Supported tho it isn’t that great Shareware and Commercial version Supported! Shareware wad is included Save/load works!
AEP-Emu (DE/EN)
DMG Page (DE)
Indie Retro News (EN)
Retroguru (EN)