Video Game

 Shortly after production was completed on the second film, the team began to have ideas about stories that took place before Operation R.E.L.P. To facilitate these ideas, it was decided that a video game tie-in would be made using the Unreal Development Kit and Unreal Engine 3. The game was a First-Person Shooter in the style of Unreal Tournament, and followed a linear story progression of about 3 hours.

 The player took the role of Prisoner #1337, a new character who was trapped in the prison of Kaiser Wilhelm von Shakespeurtin and forced to participate in weapons testing chambers. In the end, the player would come face to face with the Kaiser and battle to the death in locations from Operation R.E.L.P. Scooby Doo would make an appearance only by reference. Production was going well, but budget concerns forced the project to be cancelled in early August. A trailer of the game's alpha state can be found on Youtube [1 ] A revival of the project, however, is being considered for the future.

References
   1.  ^  "Operation R.E.L.P Video Game Trailer on Youtube". Youtube. http://www.youtube.com/watch?v=2-Z1m9NGtNI. Retrieved 1 November 2011.