One of the bands had a bunch of developers from Harmonix Music Systems, the maker of games like Rock Band. The majority of the songs were recorded in the U.S. And it shows just how much the Nazis are controlling things as the hero tries to overthrow them. It’s what could have happened to music if the Nazi tide was never turned back.

It’s as if the song never existed in English because the Nazis won World War II, and their culture pervaded everything in the 1960s. But rather than John Lee Hooker’s voice, a German singer busts out the lyrics in German. It juxtaposes the happy sounds of “Boom Boom” with horrific violence as the Nazis slaughter civilians and the hero fights back against them. Although they were created by musicians using fictional band names, the songs have a real emotional impact.