Prey is a first-person shooter video game developed by Human Head Studios, under contract for 3D Realms, and published by 2K Games, while the Xbox 360 version was ported by Venom Games. The game was initially released in North America and Europe on July 11, 2006. Prey uses a heavily modified version of id Tech 4 to use portals and variable gravity to create the environments the player explores.

id Tech 4, popularly known as the Doom 3 engine, is a game engine developed by id Software and first used in the video game Doom 3. The engine was designed by John Carmack, who also created previous game engines, such as those for Doom and Quake, which are widely recognized as significant advances in the field. This OpenGL-based game engine has also been used in Quake 4, Prey, Enemy Territory: Quake Wars, Wolfenstein, and Brink. id Tech 4 is licensed under the terms of the GNU General Public License v3.0 or later.