GOG.com now offers digital distribution of System Shock 2, following the revelation that the classic action/RPG was being tweaked for re-release for current computers on the DRM-free marketplace. For the uninitiated (which is unlikely around here), here's what Jason "loonyboi" Bergman wrote here about the game, going on 13 years ago:

Boy am I ever hooked. I haven't enjoyed a single player game this much since Half-Life, and I can't recommend the game any more highly. Of course, it should be pointed out that the game is certainly not for everyone. It's definitely more RPG than action...there's quite a bit of action in it, but if you aren't willing to put up with the skills and inventory system you ain't going to get far. If you can make it past that, you'll find yourself totally addicted, much like I am right now. Oh, and one other thing - make sure you've got a great sound setup for this one. The positional audio is some of the best I've ever heard. Really creepy stuff.