System Shock Infinite is the unofficial sequel to System Shock 2.
I've been beta-testing System Shock Infinite form months, and I keep coming back to it because it's the only System Shock game I really want to play. It has everything: throwbacks to System Shock 1, advanced hacking, multiple endings, and the chance to save the doomed crew of the Von Braun. I just hope that Le Corbeau one day releases the source code of NewDark, so enough changes can be made that I can see all the new cutscenes in-game at full resolution.