This is Panzerjäger.
Vehicles of this type were largely the result of military and economic events specific to World War II.
Generally one can say that the tank destroyers were the vehicles which, in return for giving up the versatility they provide mobile towers, tanks, cannons mounted a much more powerful than what ever could be installed and used in the fight against the then tanks.

This is SdKfz 164 "Nashorn - Hornisse.
It was antitank.
He had a hummingbird 88mm.
The official name was 8.8cm PaK43 (L/71) auf Geschutzwagen III / IV (Sd. KFZ. 164).

This is Maus.
Has a mass of 188t.
There were only two such tanks.
Its main armament was a 128 mm caliber gun with a supply of 68 missiles.

This is Mittlere Schützenpanzerwagen SD.KFZ.251/10 Ausf. D.
Mittlere Schützenpanzerwagen Sd.Kfz.251 (m.SPW SdKfz.251) is the primary armored halftrack German army during World War II, which was built on the basis of numerous other fighting vehicles.
Was built in four production models, from A to D, and 22 versions, which constitute the basic and most numerous armored Sd.Kfz.251 / 1.

This is Tiger II is the common name of a German heavy tank of the Second World War.
The tank weighed almost seventy metric tons, was protected by 100 to 180 mm.
It has 88mm cannons.

This is Flakpanzer 38(t).
It has a self-propelled anti-German during the Second World War.
Armor Type: 10 - 20 mm.
Has a 20mm-caliber cannon.

This is PzKpfw V Panther, Sd.Kfz.171.
This is medium tank.
He has had a 75mm gun.
The tank was produced in three versions - a, D and G, F version does not go beyond the testing phase.