Sudden Strike Forever was an official add-on to Sudden Strike which introduces many more historically correct units and equipment, such as the upgraded Soviet T-34 tank (1944 version). New terrains are also provided: a desert terrain for the British missions in Tobruk and Tripoli and snow terrains for Soviet missions. The expansion also polished the game engine, balanced the damage of certain units, and added a map and scenario editor.
The add-on includes 4 inter-linked scenarios for each of the campaigns for the Germans, the American, the British and the Soviets. Other units which are added into the add-on includes, but not limited to the Universal Carrier for the British; the BR-5 artillery, 160mm grenade launcher for the Soviet forces and more. The supply system has also been tweaked with artillery crews automatically resupplying themselves with ammo crates nearby instead of relying on supply trucks to do the job. The supply trucks would still be needed to repair damages inflicted on these artillery units, however.
The German campaign puts the player into the winter setting of Russian hinterlands with limited troops and reinforcements available, thus relying on use of captured Soviet artillery as well as equipment. The British campaign deals with the defense of an unnamed seaport from German attacks, whereas the American campaign probably takes place in France during the autumn season as the foliage on the vegetation suggest. The Soviet campaign involves a large armored division counter-attack on Russian soil and the storming of the Wehrmacht-controlled airfields. As with the earlier Sudden Strike original campaigns, the briefings do not explain the historical setting of the campaign, thus only issuing standardized orders to the player to e.g. dispel enemy attacks or to simply take over a designated airfield in the east and so on. The add-on also includes 5 new single player individual scenarios.
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