Scale is 300 meters across a given hex. Contour lines are 20 meter intervals. Since the 1942 battle took place in winter and the 1944 battle took place in summer, each scenario uses its own map. The military units are sections (squads), platoons, and companies. Other counters represent batteries of artillery and mortars, naval craft, individual commanders, and bunkers. Each player’s military forces must manoeuvre across the game board, attacking the opposing force with direct and indirect fire, airstrikes, naval gunnery, and fighting hand-to-hand. One player is the Defender and the other is the Attacker. The Attacker must achieve his objectives before time runs out. The longer the game goes on, the more objectives he must achieve to win. Turns are one hour. Special rules include snow storms, the Finns attacking across the ice in winter, German naval landings using barges and assault boats, naval gunfire by flak barges and a destroyer squadron, airstrikes, variable visibility due to terrain, weather, and time of day, antitank guns that can fire HE in an indirect role, and much more.

In the 1942 scenario, the Finns attack across the ice in a blinding snowstorm against a reinforced Soviet battalion of half-frozen men, some of whom nevertheless resisted for 3 days. In the 1944 scenario the Germans fail in their attempt to bluff the Finns into handing over the island peacefully, land a motley force including worn-out infantry, coastal artillery personnel, 88mm flak guns with no ammunition, and 580 men of Marine-Artillerie-Abteilug 531. The 531st was no sedentary coastal garrison, but a special commando unit whose men took part in the very first battle of the war, the assault on the Westerplatte at Danzig on 1 September 1939. The Finns defeat them all, just in time to hand the island over to the Soviets as part of the Armistice agreement.