The Gundam F90's most prominent feature is its adaptation of the Mission Packs. These dedicated optional equipment can be attached across the 11 hardpoints placed throughout the Gundam F90's body, allowing the mobile suit to take on a variety of missions. They can also be exchanged when needed, granting the Gundam F90 extremely high versatility. To control the Mission Packs, pseudo-personality computers were installed. Unit 1 has the Type-A.R., Unit 2 has the Type-C.A., and Unit 3 has the Type-K.B. The Gundam F90's standard armament consist of two head vulcans, a beam rifle, two beam sabers, and a shield.
Three Gundam F90 units were built, with Unit 1 and 2 assigned to the EFF's 13th Experimental Squadron for testing. During testing, a remnant Zeon force calling themselves the "Oldsmobile Army" appeared and stole Unit 2. Unit 2 was then brought back to their martian base and reconfigured into the OMS-90R Gundam F90. The Earth Federation reassigned the 13th Experimental Squadron, along with Unit 1, as the 13th Autonomous Fleet and sent them to Mars to destroy the Oldsmobile Army.