In Return to Castle Wolfenstein, players take on the role of B.J. Blazkowicz, a highly decorated Army Ranger recruited into the Office of Secret Actions who must escape from and then return to Castle Wolfenstein in order to thwart Heinrich Himmler's plans for an unstoppable army raised through genetic engineering and harnessing occult powers. As Blazkowicz discovers more about Himmler's evil schemes, it is up to him to defeat them before they can level the Allies once and for all.

Wolfenstein is an action-packed video game set in a near-fictional, historical WWII setting. Players take on the role of OSA agent BJ Blazkowicz as they battle against combat troops, otherworldly forces and dark science created by a supernatural Nazi force bent on world domination. As they investigate the powers of a dark parallel dimension, players join up with resistance forces and use conventional and otherworldly weapons to try to destroy the Nazi war machine. Wolfenstein provides gamers with interlinked missions that make for an intense story-driven combat experience while its multiplayer mode maintains class-based team objective gameplay with both conventional and supernatural weapons for online warfare.