Return to Castle Wolfenstein Operation Trondheim 2 Red Alert – an extensive addition created by fans of the series. The player will take control of a Soviet soldier fighting the German fascists during World War II. The mod includes a new storyline, where an ordinary village Russian is at the center of the story. One day, he managed to become a spy for the Soviet secret service.

The scenario mode in Wolfenstein consists of 10 consecutive levels, where the main character gradually improves his own spy skills and performs more difficult operations. Alone, he will face large crowds of Nazis. The gameplay is almost no different from the previous parts of the franchise. The user will need to fight enemies with firearms and cold arms. The arsenal includes weapons such as pistols, machine guns, rifles and explosives thrown over long distances.

Missions take place in different locations, such as a wooden dungeon, mine swamps, a gorge with numerous branches. Soldiers of the Third Reich will try to destroy the central character by any means. The opponent has its own weapons, abilities, weaknesses and strengths. Each level introduces new opponents and increases the difficulty of passing.