Heh, found a free, complete, easy to install "abandonware" version of the oldie but goodie, System Shock (the original) while googling around. I only played through it once eons ago, so I'd practically forgotten the entire story. I'm almost done, on the bridge level now.

Still fun, though the controls are a minor annoyance--I guess this game came out before WASD became a standard. It's interesting to consider how many of the newer games of this genre seem to have drawn from SS1.