These are tanks that either can't be bought normally or are not yet fully in the game. They are announced on the Official Tanktastic VK group and WWII League VK group with development screenshots. Currently, the German Panzer series and the KV-1 are in the game, but can only be recieved as a contest award or encountered in offline mode. Though the IS, BT-7, BT-2, and BMP-1 only exist as research tree icons. The T-28 has no icon in the game, but there is a screenshot of it.