Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack
Six Legendary Tracks. One Unstable Trombone. The UNDERTALE + DELTARUNE Song Pack brings a whole new level of chaos (and possibly spiritual awakening) to your trombone.
| Type | DLC |
| Release Date | 8/12/2025 |
| Developers | |
| Publisher | Flat2VR Studios |
| Last Updated | 8/24/2025 |
| Steam App Id | 3610400 |
- Windows
- Mac
- Linux
About Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack
Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack is an Indie and Casual DLC developed by Flat2VR Studios, and Holy Wow Studios LLC. On 8/12/2025, it was released on the Steam Store by Flat2VR Studios. Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this dlc app.
According to Steam’s category system, Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack supports the following features:
- Single-player
- Steam Achievements
- Steam Cloud
- Downloadable Content
- Steam Leaderboards
- Family Sharing
Media & Sceenshots
Explore the featured video and screenshots from Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack featured in the Steam Store.
DLC & Related Apps
Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack is referenced by 1 other related app in the Steam Store.
| Image | Name | Type | Release Date | Actions |
|---|---|---|---|---|
 | Trombone Champ: Unflattened | Game | 11/26/2024 | View |
Related Packages
Trombone Champ: Unflattened - UNDERTALE + DELTARUNE Song Pack is referenced by 1 package in the Steam Store.
| Name | Price | Actions |
|---|---|---|
| Trombone Champ: Unflattened - First DLC | $7.99 | View |