Here are some updates for System Shock 2:
System Shock 2 Patch:
Description: System Shock 2 patch adds multiplayer mode plus fixes many bugs. If you have the 'classics' version of the game, and already have the multiplayer option on your main menu, you do not need this file.
System Shock 2 Manual [PDF]:
Description: System Shock 2 manual in electronic form. Requires Adobe Acrobat Reader to view.
System Shock 2 Editor:
Description: System Shock 2 map editor.