Ace Combat Zero: The Belkan War is situated 15 years before Ace Combat 5 and has you follow the adventures of Seifer and Bigsy, two mercenary ace pilots who have been called upon by the Ustio government to defend against enemy attacks. Much like AC5, team tactics are once again important, since you rely on your wingmans comments to successfully complete missions. ACZero will feature various new planes such as the F/A-18C, F-15C, J35J or the Typhoon.