Quake
Several of the PC version's objective-based levels (units) are omitted, as well as a handful of enemy types. A new enemy (a gigantic cyborg with twin railgun arms) is added, and many short air lock-like corridors are added to maps to provide loading pauses inside what are continuous areas in the PC version.
The music of this port is a combination of the Quake II Original music score and some tracks from the PC version's mission pack.
An advantage over other console ports is that it uses the PlayStation mouse option, making the gameplay closer to the PC version.