The MasterServer=offline line is the – it tells the client not to search for a dead or blocked authentication server.
To play entirely offline without an internet connection, follow these general steps found in community guides: call of duty black ops 2 redacted offline lan download fixed
If using Plutonium for its stability, you may need to drag specific "RAW" folders into the directory as demonstrated by creators on YouTube . : The MasterServer=offline line is the – it tells