sentences:  The success of the original "Prey" led to the announcement of a sequel "Prey 2" in August 2006, with continued development by 3D Realms.However, the project faced a number of issues, including the transfer of the intellectual property (IP) rights to Bethesda Softworks (under ZeniMax Media) sometime by 2011.In March 2011, Bethesda announced that "Prey 2" would instead be developed by Human Head Studios using a modified id Tech 4 engine.