When connected to any other known data server, the DERRIESE system can be accessed by typing rlogin derriese within the in-game computer console and then entering a valid username and password.
A list of usernames has been found in the game files:
They have no corresponding passwords, so attempting to log in will always result in an "Invalid Password" error.
Despite having a dedicated server for DerRiese, players could not find any passwords tied to the users, and upon observing the game's files, players could not find more Zombies related files, apart of the ones by Ludvig Maxis and John "Banana" found in Vbush and Roppen.
Into the DLC season of Call of Duty: Black Ops III, during a "lightning round" interview with a burst of quick questions, Jason Blundell said the Der Riese passwords exist. In a later interview he backtracked his confirmation, saying there are no accessible files within the DerRiese servers. However, Blundell shared that the intended files still exist in Treyarch's offices, and that they may be shared one day. This has yet to happen, and the content of the files is unknown.
- Within a file on the home directory, encoded with a standard CIA cypher, a man called Peter McCain, also mentioned as the CIA infiltrator in Group 935 that had to be extracted by U.S.M.C. Recon member Tank Dempsey.
- There are several files found in Dr. Vannevar Bush's home directory, name-patterned as Servant####.TXT. These are data files stored by Dr. Maxis, that Dr. Vannevar Bush and Dr. Robert Oppenheimer retrieved from the Verrückt archives.
- There are 2 accounts named "edward" and "erichtofen", despite being the same person.