The T-34-100 is an experimental Soviet medium tank and the final modification of the renowned T-34. It differs from previous versions with its new 100mm LB-1 gun, T-44V turret, and revised internal layout. The Soviet Union began developing the T-34-100 because its T-34s could no longer penetrate the latest German tanks. Works on the T-34-100 began in July 1944. By the first half of 1945, the tank was complete. However, it never entered mass production because the more advanced T-44 was already in the final stages of development.

The T-34-100 was introduced in the Update 1.51, "Cold Steel". Due to its weak armor and limited reverse speed, it is not suitable for aggressive gameplay. It performs better as a support vehicle than as a breakthrough tank.