New units like the T-34 tank, Katyusha rocket launchers, and unique reward trees for Soviet and German forces.
Reliving History: Downloading the Best "Eastern Front" PC Experiences Eastern Front - Unknown War Download PC Game
If you want something released more recently that captures the "Unknown War" vibe: TOP 3 EASTERN FRONT WORLD WAR 2 STRATEGY GAMES New units like the T-34 tank, Katyusha rocket