U.S.S.R. Tech Tree Extension

GeneralDirection: Not for free, but the more top-tier vehicles you have when the update releases, the cheaper in credit cost the T-90 will be. This discount will slowly decay back to normal cost, so make sure to save up the expected 2,486,093 experience needed to go from the T-54 to the T-90 right away -- that way you can take advantage of the credit discount at its peak.