Possibly not FPS, i cant remember, but there was a game made by Bungie (way before Halo) that involded doing puzzles and stuff. was definately first person.
Whoever finds it wins a prize. Your clues are Old. First Person. Bungie. Pre-Halo. GO!
Whoever finds it wins a prize. Your clues are Old. First Person. Bungie. Pre-Halo. GO!