Skyjack (Skyjacker in Halo 3) is a medal awarded in Halo 3, Halo: Reach, Halo 4, Halo 5: Guardians and Halo Infinitemultiplayer (as well as campaign in Reach) for hijacking an enemy aircraft. In Halo 3 and Reach it is represented by an eagle on a gold shield atop a bronze cross. In Halo 4 the eagle is atop a blue circle and a grey cross turned 45 degrees. In Halo 5: Guardians the eagle is on a yellow roadsign. As this medal is attained, a message appears on the screen, saying "You skyjacked (player's name)". In Halo Infinite this is a Common-rarity skill medal.
Earning this medal in the Halo: Reach campaign unlocks the Banshees, Fast and Low achievement.
Although the medal is included in the list of Halo: ReachFirefight medals, the Banshees in Firefight cannot be hijacked and therefore the medal cannot be awarded.