If you ever do play System Shock 2, you'll know exactly what I mean.
* A battle with creepy, mysterious, unknown aliens over Tau Ceti
* A pair of A.I.'s doing battle, with the player the pawn of the egomaniacal insane one.
In some ways it seems like they're ripping Marathon off, almost.
It's so much better, mostly because it's so recent. You really feel like you're on the starship Vaun Braun.
The only reason I've posted this here, is that EVERY Marathon addict MUST play this game. I swear, it's the Marathon 4 we'll never have...