Blitzkrieg is a mod for registered Wolfenstein, made by Barry Christian. Originally slated for release sometime in 2001, it was unfinished and released on October 7, 2016 with 16 levels. 38 levels were planned.
Following in the footsteps of The Road to Neuschwanstein, the mod is a classic Wolfenstein-influenced affair with seamless level flow and other rudimentary changes. Some new graphics appear; these would later be revived in Passage to Höllenteufel and Atomprojekt.
Jack Ryerson contributed level 15. After work on the mod was abandoned, Christian would not contribute to the Wolfenstein community for a long time. Eventually resurfacing in 2008 and picking up in Blitzkrieg's shadow was Wolfenstein Forever, which in turn itself was shelved and eventually morphed into Passage to Höllenteufel.