Complex sentence: A sequel, "System Shock 2", was released by Looking Glass Studios and off-shoot developer Irrational Games in 1999; the 2000 game "Deus Ex" and the 2007 game "BioShock" are spiritual successors to the two games.
Split into simpler sentences: A sequel, "System Shock 2", was released by Looking Glass Studios and off-shoot developer Irrational Games in 1999. The 2000 game "Deus Ex" and the 2007 game "BioShock" are spiritual successors to the two games.