When I played this game, my hands were actually sweating from the SUSPENSE!  The story is quite entertaining with some predictable AND surprising twists in the plot.  This game allows you to play as a Marine (weapons), O.S.I.(psionics/mind power), or Navy (cybernetics/computers).  Each branch has its corresponding (strengths) but having superior computer skills make the game somewhat easier to proceed through the challenging levels.  There are LOTS of high tech weaponry and gadgets throughout the eerie decks of the von Braun including a "red lights" district in the crew's recreational area.  It was more fun for me to solve the levels myself rather than resorting to online walkthroughs.  If you enjoyed Half-Life and Thief, then you'll have a great time with System Shock 2!