User blog comment:Generale wareagle/How to unlock the X-49, Ui-4045 and XF-900 on the japan version of Ace Combat 3/@comment-78.9.112.108-20130215181244

I have unlocked UI-4054, XR-900 and OSL by completing all 52 missions with an A rank. You cannot do this on mission simulator. X-49 can only be unlocked by appendisc or gameshark.