Its primary task was to provide heavy fire support for infantry units fighting in urban areas.

At the time, the Wehrmacht had only the Sturm-Infanteriegeschütz 33B available for destroying buildings, a Sturmgeschütz III variant armed with a 15 cm sIG 33 heavy infantry gun.

Therefore, a decision was made to create a new vehicle based on the Tiger tank and arm it with a 210 mm howitzer.

[2] Hitler had laid great importance on the special employment of the Sturmtiger and believed it would be necessary to produce at least 300 rounds of ammunition per month.

The front of the Tiger's superstructure was removed to make room for the new fixed casemate-style fighting compartment housing the rocket launcher.

Since the Sturmtiger was intended for use in urban areas in close range street fighting, it needed to be heavily armoured to survive.

The main armament was the 380 mm Raketen-Werfer 61 L/5.4, a breech-loading barrel, which fired a short-range, rocket-propelled projectile roughly 1.5 m (4 ft 11 in) long.

Therefore, a ring of ventilation shafts was put around the barrel which channeled the exhaust and gave the weapon something of a pepperbox appearance.

[1] Located at the rear of the loading hatch was a Nahverteidigungswaffe launcher which was used for close defence against infantry in addition to a frontal mounted 7.92 mm MG 34 machine gun.

The Sturmtiger was intended to serve as a heavy infantry support vehicle, rendering assistance with attacks on heavily fortified or built-up areas.

PzStuMrKp 1000 was raised on 13 August 1944 and fought during the Warsaw Uprising with two vehicles, as did the prototype in a separate action, which may have been the only time the Sturmtiger was used in its intended role.