Okinawa is an operational level simulation of WWII 1945 invasion of Okinawa. It includes a campaign game and 4 shorter scenarios, breaking the campaign into four periods.
Air combat is done abstractly, and also in form of tactical bombardment of ground troop. Both sides may choose different tactics which may affect the combat results.
Additional features include weather, Kamikaze vs. carriers, battleship Yamato, strategic movement, US tanks and Japanese mortars support, supply and command control, US combat fatigue, recovery and replacement, and Japanese command appeals on ongoing strategy.