and I mean that for real, The menus and everything is fine, the intro cutscene is just fine as well but once I get into gameplay I only have a very small picture on the top left hand corner, I can't see anything, I've tried adjusting screen rez and everything but no luck... any ideas? I really want to play this game but I can't :(

Did you try this?

http://www.gog.com/forum/system_shock_2/major_graphics_bug_black_screen_with_small_square