Street Fighter 2 is a mod for shareware Wolfenstein. Initially made in 1993 and released by The Byterunners, Andy Nonymous ported the mod from v1.0 to v1.4 and cleaned up some graphics and sounds. New maps were also added, in place of the standard set of levels found in Wolfenstein 3D's Episode 1.
The mod was also sometimes dubbed WolfSF2.
Five of the levels featured were actually from an old 1992 map set called w3dvisio.