This is all just a bad dream...
And you're NEVER waking up!
Flowey's message on the "game over" screen

Your Best Nightmare is the 79th track in the Undertale Soundtrack. It plays during Photoshop Flowey's battle at the end of a Normal Pacifist or Neutral Route.

The song is composed of various parts. The first part consists of a dark tune that samples the melody from You Idiot. This plays only at the start of his battle and is not included in the loop. A distorted version of Flowey's laugh plays before the song alternates between two parts: variations on the first tune with a breakcore beat during Flowey's fight and variations of Your Best Friend during the encounters with the SOULs. Flowey's segments are followed by the sound of TV static as a SOUL presents itself.


  • The song is split into multiple tracks that play during the battle against Photoshop Flowey, all beginning with "mus_f_," except for Photoshop Flowey's laugh, the static noise, and the music in the third and fifth stages.
    • "Your Best Nightmare" begins with "mus_f_intro" and "bosslaugh" and then repeats "mus_f_part1" and "mus_f_part2" until the "mus_f_alarm" sound effect plays.
      • Another part, "mus_f_part3," is unused. However, some segments of it are heard during the third and fifth stages as a separate sound effect.
        Mus f part3
    • The six SOULs are named "mus_f_6s_1" through "mus_f_6s_6" in the game files.
  • This is the fourth longest track in the Undertale Soundtrack after Bring It In, Guys!, Reunited, and Undertale.
  • The drum loop in all parts of the song are heavily modifed versions of Amen Break.
Undertale Soundtrack
1 - 10 Once Upon a Time • Start Menu • Your Best Friend • Fallen Down • Ruins
Uwa!! So Temperate♫ • Anticipation • Unnecessary Tension • Enemy Approaching • Ghost Fight
11 - 20 Determination • Home • Home (Music Box) • Heartache • sans.
Nyeh Heh Heh! • Snowy • Uwa!! So Holiday♫ • Dogbass • Mysterious Place
21 - 30 Dogsong • Snowdin Town • Shop • Bonetrousle • Dating Start!
Dating Tense! • Dating Fight! • Premonition • Danger Mystery • Undyne
31 - 40 Waterfall • Run! • Quiet Water • Memory
Bird That Carries You Over A Disproportionately Small Gap • Dummy!
Pathetic House • Spooktune • Spookwave • Ghouliday
41 - 50 Chill • Thundersnail • Temmie Village • Tem Shop • NGAHHH!!
Spear of Justice • Ooo • Alphys • It's Showtime! • Metal Crusher
51 - 60 Another Medium • Uwa!! So HEATS!!♫ • Stronger Monsters • Hotel
Can You Really Call This A Hotel, I Didn't Receive A Mint On My Pillow Or Anything
Confession • Live Report • Death Report • Spider Dance • Wrong Enemy !?
61 - 70 Oh! One True Love • Oh! Dungeon • It's Raining Somewhere Else • CORE Approach • CORE
Last Episode! • Oh My... • Death by Glamour • For The Fans • Long Elevator
71 - 80 Undertale • Song That Might Play When You Fight Sans • The Choice • Small Shock • Barrier
Bergentrückung • ASGORE • You Idiot • Your Best Nightmare • Finale
81 - 90 An Ending • She's Playing Piano • Here We Are • Amalgam • Fallen Down (Reprise)
Don't Give Up • Hopes and Dreams • Burn in Despair! • SAVE the World • His Theme
91 - 100 Final Power • Reunited • Menu (Full) • Respite • Bring It In, Guys! • Last Goodbye
But the Earth Refused to Die • Battle Against a True Hero • Power of "NEO" • MEGALOVANIA
101 Good Night