Castle Erlangen (German for "achieve" or "obtain") is a "heavily guarded fortress" which serves as the location for one or two missions in Wolfenstein 3D (& Mac Family/Jaguar/3DO missions). It originally appeared in Episode Five: "Trail of the Madman", however a separate source also names it as being the location of the preceding Episode Four: "A Dark Secret" as well. It is the location of the second mission of 2nd Encounter (Mac Family/Jaguar/3DO storyline), and Trail of the Madman also appears as separate mission in the 3rd Encounter.