Ace Combat 2 introduces into the series enemy ace pilots. Marked as 'DANGER!' on the mission information viewer, these pilots not only have unique paintjobs and schemes on their aircraft, but they pose a greater challenge to players. As opposed to regular enemy pilots, enemy aces are more aggressive in their pursuits, more able to evade even the surest missile lock-ons, and may take more damage to defeat. Enemy aces can come as individual pilots, pairs of two, or groups of three or four. During combat, enemy ace pilots are identified by radar with their call-signs in addition to the aircraft they fly.