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Irrational Games was an American video game developer which started in 1997 formed from three former Looking Glass Studios employees: Ken Levine, Jonathan Chey, and Robert Fermier. Take-Two Interactive acquired them in 2006. They were best known for two of the games in the BioShock series, as well as System Shock 2, Tribes: Vengeance, Freedom Force, and SWAT 4. Following the release of BioShock Infinite, Levine left the AAA industry in 2014 to work on smaller, narrative games. He started a smaller studio within Take-Two with some Irrational employees, later named Ghost Story Games, while Take-Two closed down Irrational Games.