British video game studio best known today for creating the popular 'Tomb Raider' series; founded in Derby by Chris Shrigley, Andy Green, Rob Toone, Terry Lloyd, Simon Phipps, Dave Pridmore, Jeremy Heath-Smith and Greg Holmes, most former employees of Gremlin Graphics; acquired by Eidos Interactive in 1996; Eidos moved development of the Tomb Raider franchise from Core Design to Crystal Dynamics in 2003; 2006 Core Design's assets and staff were sold to independent development group Rebellion.