GERMANY
Sd.Kfz.234/2 Puma - Advanced Armoured Car w/ 50mm cannon
Sturmtiger - Super-heavy Assault Gun w/ 380mm mortar
Jagdtiger - Super-heavy Tank Destroyer w/ 128mm gun
Panzer VIII Maus - Super-heavy Tank
Flakpanzer Kugelblitz - Advanced Anti-Aircraft Tank
Me 163 Komet - Rocket-propelled Fighter
SOVIET UNION
A-40 Krylya Tanka - Air-Dropped T-60
IS-3 - Advanced Heavy Tank
BM-31 Katyusha - 300mm Truck-mounted Rocket Launcher
SU-14 - Self-Propelled 203mm howitzer
KV-2 - 152mm Assault Tank
SU-101 - 100mm Advanced Tank Destroyer (based on T-44, frontal protection better than IS-2)
BRITAIN
Crusader Mk III AA Mk I/II - Advanced Anti-Aircraft Tank
A39 Tortoise - Super-heavy Tank Destroyer
A41 Centurion Mk I - Advanced Heavy Tank
USA
M-26 Pershing - Heavy Tank
M-36 Jackson - Heavy Tank Destroyer
T28/T95 - Super-Heavy Tank Destroyer
M12/M41 SPG - 155mm Self-Propelled Artillery