GameSpot have posted a preview on the upcoming add-on pack for the first person shooter Return to Castle Wolfenstein from Gray Matter Studios and Nerve Software. Read more... It will include 10 new single-player missions and 10 new multiplayer maps. In addition, the expansion will also add several new weapons, engineer abilities, and even a new player class: the covert ops specialist. Like the spy in Team Fortress, the covert ops class has the ability to pick uniforms off any dead soldiers and assume a new identity. E3 2002: Return to Castle Wolfenstein add-on pack impressions