darkredshift: I think they're text based in that one, further ripping off Marathon
Fenixp: But... Marathon came out in December, whereas System Shock came out in September of the same year.
That was the floppy version. the full CD version came out in 1995. although I think the design doc for SS1 was actually made in 1993 according to the other post about Pathways into Darkness being the first FPS RPG.
Even if I see the similarities as rip-offs or not, I don't really care as they're both awesome in their own ways and I personally prefer SS1 with Mouselook enhancements over SS2 in some regards due to the engine giving a feel like a Space Colony Ark zone in the Crystal Maze, not to mention the best lockpicking and hacking minigames I've seen (puzzles and cyberspace).
I don't know when Alex and Jason finished the design for Marathon but it was released in Dec 21 1994 in time for Macworld and half of Bungie's development time was spent reworking the campaign levels which at that point in development, sucked because they had so much fun play testing the multiplayer.
More people have heard of System Shock than Marathon mainly because Marathon used to be Mac only and from a serious gaming standpoint, Macs suck. The only reason to get one back then before DOS and Windows games got ported to them was to play Bungie games which were arguably more awesome than their id counterparts.
EDIT: on a similar note, I think an SS3 should have SS1 visuals and SS2 style gameplay with a modern engine based on SS1 Enhanced, with the return on non useless Deus Ex 1 Augs and SS2 Psi powers, like a sci-fi Ultima Underworld without the shitty controls. ( Augs are useful in System Shock 1, but not Deus Ex 1 unless you count the flashlight which was the most boring of the augs in DE1)
PS, I think the Enhanced version Mouselook and better controls should be added to UU and UU2 as an optional add-on in a free patch so I can play more of the game without getting bored and irritated due to bad controls and monotonous piano keys plunking whenever I walk or run, like a Halloween themed episode of the Raccoons.