Undertale Wiki
For the minigame, see Thundersnail.

do you want to play a game?
it's called thundersnail.
the snails will race, and if the yellow snail wins, you win.
it's 10G to play.

Napstablook explaining the rules

Thundersnail is the 42nd track of the Undertale Soundtrack. It plays during the snail race on Napstablook's family farm.


  • Thundersnail resembles the intro of the song F-F-Fire! from Mother 3.
  • According to Toby Fox, the song was made out of one edited sample of (possibly) a xylophone.[1]


  1. random fun fact: the song "thundersnail" is made entirely out of one sample that I edited somehow. it was a xylophone or something - Toby Fox (@tobyfox) on Twitter, October 22, 2015.