Ace Combat 4: Shattered Skies ^{(PlayStation 2)}

Unlockable: Added Options

Once you have beaten all 18 missions, a couple of new options will be unlocked. Load your saved game (with all missions complete), then go to the main menu. The new options will be listed there. They are: Special Continue, which allows you to play through missions with different aircraft; Free Mission, which allows you to play any mission; Trial Mission; Scene Viewer and Music Player.

Unlockable: Expert mode

Beat the game on the hard difficulty setting.

Unlockable: Ace mode

Beat the game on the expert difficulty setting.

Unlockable: X-02 Stealth

Get "S" ranking on all 18 missions under normal difficulty. Two different colors can also be unlocked by getting "S" ranking on all 18 missions on hard and expert difficulties.

Unlockable: Tiger Striped F-43

Complete the game on any difficulty and use the Special Continue option.

Unlockable: Three new multi-player arenas

Complete the game on any difficulty.

Unlockable: Alternate jet colors

To unlock the various jets and their alternate colors simply shoot them down in combat. Each jet has three alternate colors, the last of which is unlocked by shooting down the ace pilot in each of the 18 mission. Here are the locations of each ace pilot but be watchful--they won't show up on radar.

• Mission 1: F-5, north of the Allied airbase
  
• Mission 2: A-10, north of the enemy airbase
  
• Mission 3: F-16, south of the westernmost radar station
  
• Mission 4: Mirage 2000, northwest of the westernmost radar jammer
  
• Mission 5: MIG-29, south of the westernmost pumping station
  
• Mission 6: F-14, north of the northenmost group of enemies
  
• Mission 7: TND-IDS, north of the solar tower
  
• Mission 8: F-18, after refueling the ace will appear to the east
  
• Mission 9: F-15C, north of the center beach
  
• Mission 10: RF-01, northwest corner of the map
  
• Mission 11: SU-35, ace appears with about 90 seconds left for the mission
  
• Mission 12: F-2, north of the Stonehenge base
  
• Mission 13: F-15E, after clearing the radar balloons the ace appears in the east
  
• Mission 14: F-22, northeast of the map
  
• Mission 15: EF-2000, center of the map
  
• Mission 16: F-117, northwest of the westernmost combat zone
  
• Mission 17: F-15A, northwestern corner of the map beyond the city
  
• Mission 18: S-37, north of megalith
  

Unlockable: Ace Difficulty

You must complete the game under expert difficulty.