Emancipation is quite calming, but when the bell strikes, it invokes a feeling of uncertanity. In later part (about 3:18), it turns into an awesome rousing theme.
Whiskey Corridor cannot go by without a mention, especially not with what starts at 2:50.
Stonehenge Attack. Made doubly terrifying when you hurry to obey the sudden order to drop altitude, not knowing why it was given, and watch as half your allies get blasted out of the sky above you.
Ace Combat 5: The Unsung War
Hrimfaxi, a reprise of the music from the earlier Scinfaxi fight, but with some insane electric guitar thrown in for effect.
Into the Dusk A more somber piano version of The Unsung War.
15 Years Ago Another piano version that you normally hear during Nagase's and Gennette's musings on the Belkan war, but also plays during the final mission if you beat the enemy planes quick enough. This song, along with the ordinarly sappy dialouge, makes those two minutes leading up the SOLG assault practically into a CMOH/Tear Jerker.
Unsung Heroes, a short, yet still magnificent piece, truly befitting of your final victory.
Diapason - A rousing, uplifting piece that plays as the player flies in the skies over the capital city of their homeland, pushing the Belkans and liberating the city.
Glatisant - The beat gives it an ominous feel as you enter your enemy's home country. Hard to believe people missed this.
Contact is absolutely fantastic. It fits the incredibly frantic dogfight against the ace squadron at B 7 R so well.
Zero - AKA Keiki Kobayashi's Crowning Moment of Awesome Anyone who considers themselves a music fan owes it to themselves to listen to it at least once.
To put it into better perspective, imagine yourself as the only person in the whole damn world capable of putting a stop to the maniacal terrorist organization who just launched a missile capable of wiping out half the cities in a US-sized nation. All that stands between you and the destruction of that missile is your former wingman, and you have to literally joust against him in air combat. You have the skills; he has the technology— Just you vs. him in a duel for the fate of the world. And this song captures the feeling of that moment perfectly.
Malebolge, fitting for the fight against Pasternak in the CF-44 Nosferatu.
San Loma Assault at first seems run of the mill for Ace Combat, until the brass comes in.
If you'd already played AC 4 and 5, you probably knew something bad was going to happen the moment they told you your last mission was a peaceful patrol over Gracemaria. When City Lights starts playing, those suspicions are confirmed.
Keep Alive is a near-perfect blend of militaristic drums, electric guitar and electronic music samples, creating what is probably one of the most epic BGM ever conceived for a 21st century aerial battle.
The 3D Cross Rumble soundtrack calls this song "Like a Phoenix Rising," but in the credits for Assault Horizon Legacy this song is titled "Gravity." This is also the name Noel herself used for the song.