Ace Combat 2 Unlockables

Finish the game under normal difficulty. Play the game again under hard difficulty and reach the low altitude surprise attack mission (Dead End). Locate and destroy the four YF-23As in the special Fox Force Four squadron south of the target. A medal and the XFA-27 will be awarded on the debriefing screen.

Finish the game with the normal or bonus ending. A new option will be unlocked after you choose a difficulty setting under the START GAME option in the title prompt. Pick that option to buy some new aircraft as you play through the game again. The new fighters include the F-15S, MiG-31, Su-25, and the XFA-27.

Play the game up to mission 19, "Kingpin". Finish the mission without shooting down the skilled enemy pilot Z.O.E. This is the enemy plane that is marked "Danger" in the briefing screen.

Play the game up to mission 19, "Kingpin". Finish the mission after shoot down the skilled enemy pilot, Z.O.E. You will then be able to play mission 20, "Last Resort". Do not shoot down the cruise missile that is launched during that mission.

Play the game up to mission 20, "Last Resort". Shoot down the cruise missile. You will then be able to play mission 21, "Fighter's Honor". Finish this mission to see the bonus ending.

A new Mine level is unlocked when you destroy the C-5 transport on the first Raven level.

Complete the game with a rank higher than First Lieutenant. A selection for music player mode will appear in the options menu. Any of the 28 music tracks on the game disc may be played. Push L1 or L2 to jump to the next track, R1 or R2 to jump to the previous track, Circle to select a track, Select to toggle the screen, and Square, Triangle, or X to quit.

Finish the Kingpin mission. A "Free Mission" option that allows any mission to be played will appear at the opening menu.