Wolfenstein 3D
Although id Software did not develop another "Wolfenstein" game, as their development focus shifted to "Doom" shortly after release, and has never returned to the series, multiple "Wolfenstein" titles have been produced by other companies, sometimes using game engines developed by id. The first of these newer "Wolfenstein" games was "Return to Castle Wolfenstein" in 2001, a reboot of the series, and the latest is the 2017 "".
Return to Castle Wolfenstein
This gameplay was later reutilized in a full-fledged commercial game "" set in id Software's "Quake" universe. A semi-sequel called "Wolfenstein" was developed by Raven Software and id Software and published by Activision, and released on August 18, 2009. A sequel titled "" and a standalone prequel expansion titled "" have also been released in 2014 and 2015. The Old Blood references RTCW with characters with similar names and the X-labs being mentioned.