Play DOOM I & II On Any PSP Without CFW! - YouTube
Doom (2005) – Review – Inconsistent Pacing
PSP Hexen, Heretic, Doom Updated - Exophase.com
DoomPSP - GameBrew
GitHub - mwpenny/chocolate-doom-psp: A port of Chocolate Doom for the Sony PSP. Chocolate Doom is a Doom source port that is minimalist and historically accurate.