Even when surviving characters are faced with the Corruption, both the survivors and the corrupt victims can let out some sick songs in a struggle for victory.
Beware for unmarked spoilers for Corruption Expanded and Friday Night Funkin': Corruption!
Prologue
- "Deathmatch
" of the Corruption Expanded provides a much more intense experience to watch Daddy Dearest fight the Corruption, when compared to the original "Deathmatch" from Friday Night Funkin': Corruption. Since the "Deathmatch" remix is now a Marathon Level song, it provides many opportunities for more corrupted victims to have their turn to rap battle Daddy Dearest. Alongside with more corrupted opponents, they also have more notes and time to take their lead in the battle, before Evil Boyfriend makes his return to rap battle Daddy Dearest in the end.
Week 1
- "Ruins/Perished", being the first song of the Week and a remixed version of "Parish", is a rap battle between Sarvente and Evil Skid and Pump. The instrumentals have a spooky feeling to them, due to Evil Skid and Pump's Halloween-like costume designs, and a low growling sound that is accompanied by creepy whistle blowing.
- "Disdain"note is a remix of "Worship" and has Sarvente rap much faster this time from having heard Skid beg for help. Loud beats can be heard dropping as part of its instrumentals, alongside the whistles being blown to give off a creepy tune. As Sarvente sings harder, she occasionally harmonizes with Evil Skid and Pump, which creates a pleasant tone. Once the song reaches its end, Sarvente and Evil Skid and Pump let out a distorted long note.
- "Despair", being a remix of "Zavodila", has Sarvente be the lead singer of the song instead of Ruv. She takes her time to sing out the double notes Ruv used to sing, and for the times Sarvente and Evil Skid and Pump get serious, both can let out long melodies that are played together, creating a pleasurable sound. To further increase the serious tone, its instrumentals let out a howling voice with Halloween-like motifs.
- "Daemonophobia", a remix of "Gospel", serves as the final battle for Sarvente against Evil Skid and Pump. Right as the song starts, Sarvente lets out a barrage of notes and goes all out to protect herself from Evil Skid and Pump. As the characters sing intensely, the instrumentals give off comforting sounds of guitars and drums being harmonized. When more characters arrive to battle Sarvente, the latter's singing becomes more panicked, while the extra corrupted characters get to show off their own melodies. Once Evil Skid and Pump return to rap battle Sarvente again, they all end that battle by singing long distorted phrases.
Week 2
- "Blasphemy", the first song that introduces Ruv to Evil Pico being his main opponent of the Week, gives out a dreary and threatening tune to Ruv's allies and their hidden base having been found by Evil Pico. Although having a slow beat, the song's instrumentals have small themes of guitar rocking, and it only gets even more intense as it slowly reaches its end, when Ruv and Evil Pico rap in a pace so fast that they start to emit afterimages of themselves. This is also where "Blasphemy" builds itself up to reach the peak of its beat before finally dropping it.
- "Presledovanila", the second song of the Ruv week, takes place in a highway where Ruv is always running, while Evil Pico is chasing him on top of a limousine. Unlike the dreary atmosphere in "Blasphemy", this song is much more action packed with the drumbeats behind its instrumentals. At first, the "Pico" Leitmotif slowly builds up Sunday's guitar rocking. Combined with Ruv's loud voice, they synchronize so well that they are able to overpower Evil Pico in the first half of the song. Despite Sunday's connection with Ruv being cut off by Evil Pico, the second half of the song becomes more disco themed, while combining with the flashing lights of the tunnel in the background. As Ruv leaves the tunnel, he sings a melody that fully refills his health, while building up his departure from the tunnel. Near the end of the song, Ruv's rapping becomes so much more intense the moment his Corruption really starts to spread from the lack of backup and Evil Mommy Mearest making her appearance.
- "Intermission" is A Day in the Limelight song where the focus is changed from Ruv to his allies needing to deal with Evil Girlfriend hunting them. The entire song is incredibly loud from the efforts of Sunday, Carol, and Kapi all working together to overpower Evil Girlfriend. On top of its loud instrumentals, Sunday's guitar further heightens the noise of "Intermission", which even causes Evil Girlfriend to block out her ears. As all of the survivors sing, they also use their resources to combat Evil Girlfriend, so they are always on the winning side.
- "Rebellion" is the final song for the final battle between Ruv and Evil Pico, which lasts about eight minutes. It's a fast-paced track filled with lots of action over the increasing amount of corrupted victims overwhelming Ruv and each new opponent having their own unique Leitmotif playing in the battle.
Week 3
- "Last Agony", the starting song of Week 3, is a battle between Tabi fighting Evil Daddy Dearest. The vocals in the song harmonize well with each other, despite occasionally glitching in with the instruments. Eventually, the song speeds up the singing of Tabi and Evil Daddy Dearest to escalate the battle into further levels.
Others
- "Broken Memory" serves as the game over screen theme and is a creepy lullaby that gives off dreary undertones from the loss of failing a rap battle.
