"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 ordinarily sappy dialogue, 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 your final victory.
Even two "unknown" tracks that don't have a title are good. The first one plays during second part of missions "Ice Bound" and Wild Card", while the second one plays only during the raid on Sachana Air Base in "Blitz" and includes a portion of the game's main theme.
"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 Gracemeria. When "City Lights" starts playing, those suspicions are confirmed.
"Gravity". The Ending Theme with some pretty awesome lyrics. note 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.
"Fighter's Honor". It's been an established tradition for Ace Combat protagonists to get an awesome orchestral song singing their praises for the final battle, and now Scarface One gets his own.