AirForce Delta is a flight combat game that was developed by Konami for the Dreamcast. There is also a Game Boy Color version that was developed by The Climax Group and published by Konami.
Nine years ago, in the Federated Republic of Zabayral, ethnic tension broke out causing a civil war. Due to the ethnic tension, neighbors began drawing boundaries according to religious faith. However, Zabayral never maintained an army, instead the citizens relied on the nation's rich mineral reserves, because of this, they hired mercenaries to fight for them.
Currently, there is a revolution being led by forces seeking unification. This revolution began in a northern country, the Klonne Republic, and has since spread southwards. The unification forces are now approaching the Republic of Laconia. AirForce Delta is the mercenary defense organization employed by the Republic of Laconia, this is who players fly for.