Along with the standard SS infantry, Blazkowicz must fight elite troopers, supernatural undead creatures, and mechanized super soldiers. After escaping his capture at the titular Castle Wolfenstein, Blazkowicz must investigate the SS Paranormal Division (led by Helga von Bulow), foil the plans of the SS Special Projects Division (led by Wilhelm 'Deathshead' Strasse), and stop 'Operation Resurrection' (an attempt to resurrect the powerful warlord Heinrich I). Blazkowicz, an Allied OSA ('Office of Secret Actions') agent investigating a variety of dangerous Nazi projects. In the single-player campaign, players play the role of B.J. Along with a single-player campaign (developed by Gray Matter) that puts a similar 'alternate historical' twist on World War II (adding supernatural elements and secret technological advancements), the game also includes an online multiplayer component (developed by Nerve) with class-based team-oriented gameplay (which became the basis for the standalone Wolfenstein: Enemy Territory).
Powered by id Tech 3, Return to Castle Wolfenstein is a loose remake of id's Wolfenstein 3D (and the first in a series of new Wolfenstein games). Return to Castle Wolfenstein is a first-person shooter developed by Gray Matter (in conjunction with Nerve) and published by Activision for the PC on November 19, 2001.