 As of 2005, the game has been in development for nearly an entire  decade. 3D Realms originally announced Prey in 1995, but after  several years of development it was put on hold in 1999. Technical  difficulties were cited, and one of the game programmers commented  that the games most highly touted feature, "portal tech" was just  too ambitious for its time. Portal tech was a feature that could  dynamically create rips in space allowing portals to be generated  on