RETURN TO CASTLE WOLFENSTEIN

> How to play Return to Castle Wolfenstein online in 2026

Return to Castle Wolfenstein, released in 2001 by Gray Matter Interactive (single-player) and Nerve Software (multiplayer) on id Tech 3, relaunched the Wolfenstein franchise and helped define the World War II FPS with occult paranormal elements. You're BJ Blazkowicz (yes, that one, now in 3D) infiltrating a Nazi castle packed with grotesque experiments: chemically enhanced soldiers, summoned demons, the undead, and the SS Paranormal Division. Iconic weapons (Sten, Thompson, MP40, scoped Mauser, Venom Gun, Tesla Gun, Panzerfaust), plus a multiplayer mode that would spawn Wolfenstein: Enemy Territory the following year.

Old Servers runs a free, dedicated RTCW Co-op server, 24/7, using the Coop mod that lets up to 8 players clear the campaign together. Connect directly by IP or with the Launcher available from our Discord. Perfect for diving into the Nazi castle with friends, facing zombies and super-soldiers without having to solo the campaign. The original RTCW didn't have official co-op; here it's implemented with a mod, and it works.