Level design:            Altered Reality (Simone Gremmo)
Portal Wrench:           Sars!
Voice of Tommy:          Altered Reality
Voice of Jen:            The Baskinator
Voice of Enisi:          Clint Basinger
Voice of the Keeper:     Altered Reality
New sounds (not voices): Altered Reality
New background music:    Fabio "FBY" Barzagli
Original textures:       Altered Reality
Non-original textures:   Remedy Entertainment (Max Payne texture pack 1)
                         Hipshot (torn world skybox)
                         Anthony Terlizzi (hangar crate texture)
                         HRP Team (base for textures barreltoxic, barreltoxiccap,
                                  beddouble, building01, building02, building06,
                                  wall01, wall03, wall03a, wall03b, woodcrate).
                                  These textures, their bumpmaps and specular maps
                                  are released under the HRP Art License.
French localization:     Simon Guyart
German localization:     Martin Muster
Italian localization:    Simone Gremmo
Spanish localization:    Xag

Everything else:         id Software (Doom 3 engine)
                         Human Head (Prey development)
                         3DRealms (Prey IP)