"Air-to-ground"@en . . . . "Tutorial (mission)"@en . "Campaign Mission 1"@en . "Tutorial"@en . "Ace Combat: Northern Wings"@en . "Grendel 1"@en . "Complete the training exercise."@en . . . . "Tutorial is the first mission in Ace Combat: Northern Wings. The player must complete their training to become the leader of Grendel Squadron."@en . "Air-to-air"@en . "Tutorial is the first mission in Ace Combat: Northern Wings. The player must complete their training to become the leader of Grendel Squadron."@en . .