Warner Bros. Interactive Entertainment has signed long-term deal to use Epic's Unreal Engine 3, reports Develop, saying the engine will be used by WBIE's internal developers Rocksteady Studios and NetherRealm Studios, and the deal also gives them the option to use the engine on any games it publishes between now and 2014. "We're very excited that the talented production teams at NetherRealm and Rocksteady will continue to make Unreal Engine 3 their exclusive core technology for the next few years to create the exceptional titles they are so known for," said Epic Games VP Mark Rein.