Vorige week kregen we de bevestiging dat de uitbreiding van Return to Castle Wolfenstein in de maak is. Het beestje had alleen nog geen naampje, maar daar is nu verandering ingekomen. De uitbreiding heet Enemy Territory en heeft als ontwikkelaars Splash Damage die eerder de Q3 Fortress Mod hebben gemaakt en Mad Doc. Splash Damage zal de tien multiplayer maps ontwikkelen, Mad Doc doet de tien singleplayer maps.Other new weapons in the Wolfenstein add-on include a grenade launcher and a land mine for the engineer class. These mines can be placed anywhere on a map, and they need to be armed manually. They're deadly to enemy players, though any engineer can defuse them in a matter of seconds. The engineers will also be able to build certain structures. For example, on the level that was used to demonstrate the game, Nazi engineers were able to construct a watchtower and machine gun nest, and the Allies could build a bridge that facilitated swarming their enemy's base. All these structures are destructible, and they can be built only in certain locations.

Verder zal er een nieuwe klasse aanwezig zijn in Enemy Territory en kunnen Engineers verschillende gebouwen bouwen en mijnen neerleggen. De uitbreiding zal later dit jaar in de winkels verschijnen.