Far Cry: Vengeance is not the first Far Cry game, and it was released for the PlayStation Portable (PSP) and Xbox 360 in 2006. However, I believe you are referring to the first Far Cry game, which was initially released for PC, PlayStation 2, and Xbox in 2004.
Search Summary: This article covers Far Cry 1 PSP gameplay, controls, graphics, multiplayer, story, emulation via PPSSPP, price, and comparison to the PC original. far cry 1 psp
Remote Play: Users with a hacked PSP might have used "Remote Play" to stream the PC version or the PS3 port (Far Cry Classic) to the handheld, creating the illusion of it running natively. Far Cry: Vengeance is not the first Far
Information on homebrew projects where fans have tried to port similar engines to the PSP. Remote Play: Users with a hacked PSP might
This "Face Button Aiming" was controversial. It lacked the precision of a mouse or dual analog, but Rebellion implemented strong aim-assist and a "snap-to-target" button. After an hour of practice, it became playable and even enjoyable.
Visibility: No official gameplay or screenshots were ever released before the project was shelved. Modern Homebrew and Source Code Potential