In the conclusion of the Xbox 360 game, Prey, a sequel is suggested with the text: ”Prey will continue”. Prey is developed in collaboration by Human Head and 3D Realms – the game is up for a July 14th release date.
Prey was first announced in 1997 and was cancelled quickly after that – the development, suprisingly enough, continued and the game is here, almost 10 years later. Prey, however, has yet no claim to the delayed-development crown for 3D Realm´s Duke Nukem Forever (also announced 97´) still lacks a release date.
Hopefully we will be seeing Prey 2 sometime earlier than 2016. A documentary of Prey´s development history can be found here.