Oh my god it has a camera shutter for the compass!!!! So cool!! Does the compass actually work? I heard that compasses don't work as well around metals because the metal throws off the magnetic field or something.
Well, it's an old FPS game that uses a modified Doom engine. You use one of three characters (fighter, cleric, mage) which have their own individual strengths and weaknesses, and different weapons. It's got a kind of gothic/dark fantasy air to it--cathedrals full of monsters, underground trap-filled labyrinths, the works.
It's pretty easy to find via the interbutts, and I'd recommend running it through Zdoom ([link]) so it plays with more modern FPS controls as well as better resolution.