Trombone Champ: Undertale + Deltarune is an indie developed by Holy Wow Studios, released 18 December 2025 on Mac and PC (Microsoft Windows).
What Trombone Champ: Undertale + Deltarune is
Trombone Champ: Undertale + Deltarune is an indie game developed by Holy Wow Studios and released in 2025. It is available on Mac and PC (Microsoft Windows).
How it plays
Its themes are horror. It is a single-player game with no multiplayer component.
What it launched against
Trombone Champ: Undertale + Deltarune launched on 18 December 2025, within three weeks of Metroid Prime 4: Beyond, Routine, Marvel Cosmic Invasion and Rhythm Doctor.
Released around the same time: Metroid Prime 4: Beyond, Routine, Marvel Cosmic Invasion, Rhythm Doctor.
Official trailer
Sourced from the publisher’s YouTube channel.
Screenshots
All media
Parents
Quick answers
Trombone Champ: Undertale + Deltarune — frequently asked questions
When did Trombone Champ: Undertale + Deltarune come out?
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