For completing the mode, you will be able to receive the new and unique premium TITT Rozanov (USSR, Tier-8, MT, Premium) for FREE.
This is the first time that a tier8 premium tank has been issued in the “Mirny-13” mode.
To get the tank you will need to collect decryption keys in battle. The keys will decipher memories and unlock films. For collecting all 15 films you will receive the “TITT”.
In essence, completing the mode itself means winning all phases on all difficulties. So nothing has changed here.