Vapor Buster
The watercooler shows no mercy.
Narration during an encounter with a Watercooler, Chapter 3
Vapor Buster is the 15th track of the DELTARUNE Chapters 3+4 OST. It plays during encounters versus Watercoolers. It is a slightly modified and slow version of Rude Buster.
A 4-second excerpt from this track was featured during the Spamton Sweepstakes, on the /weather/ page when clicking on Lanino and Elnina under the name battle_vapor, as well as on the /shadowmen/ page, where a battle against Shadowguys has been shown. Despite this, the track does not play in battles against either Lanino and Elnina or the Shadowguys.
A small, low-quality segment of this song was featured as transit songs for Shadowguy's top 5 Chapter 3 quotes video that was shared on the official UNDERTALE/DELTARUNE Bluesky[1] and Twitter.[2] In order, the songs are Deltarune's Welcome to the Green Room, Undertale's Hopes and Dreams, Stronger Monsters, Deltarune's Vapor Buster, Vs. Susie, and Undertale's Power of "NEO".
- The title of this track is a pun on both the vaporwave genre of music and water vapor.
- ↑
Delta Rune chapter 3 shadow guy top-5 quotes
— @undertale.com on Bluesky, May 21, 2025. - ↑
Delta Rune chapter 3 shadow guy top-5 quotes
— @UnderTale on Twitter, May 22, 2025.