The ASF-X Shinden II (???, "Magnificent Lightning") is a next-generation combat aircraft. In the Assault Horizon universe, the aircraft was a prototype for the active service variants, collectively known as the F-3 Shinden II, developed to protect Japan airspace.The ASF-X Shinden II was created by Shoji Kawamori, known as the creator of the Macross  series, as exclusive downloadable content for Ace Combat: Assault Horizon. The aircraft was an attempt by Project Aces to bring together the futuristic style of Kawamori's work (most notably seen in his Variable Fighter designs) with modern flight technology.Ace Combat Infinity, the next console release in the Ace Combat series following Assault Horizon, featured the ASF-X Shinden II as the aircraft of choice of the Ridgeback Squadron, an elite squadron under the United Nations Forces. The aircraft's development history in the Infinity  universe is still unknown. AG1 unlocks missile.