Wolfenstein is a FPS co-developed by Raven Software, id Software, Pi Studios and Endrant Studios and published by Activision. The game was first revealed in 2004 during an interview with id Software’s Todd Hollenshead on TechTV and then released in 2009. [Info from Wikipedia] When Wolfenstein was shown in August 2008, there was a slight difference in one of the games guns. It seems that what’s 2 seperate guns in the final game was at one point 1 weapon. In this screenshot you can see the beta weapon:
The gun’s model was used in the final game for this electricity based weapon:
And the particle beam coming out of it was used for this gun: