UNDERTALE: The Determination Symphony

ENSEMBLE ARTS PHILLY AND MAMMOTH LIVE PRESENT UNDERTALE: THE DETERMINATION SYMPHONY, A LIVE ORCHESTRAL EXPERIENCE FEATURING MUSIC
FROM THE BELOVED VIDEO GAME,
SEPTEMBER 20, 2026

Curated personally by creator and composer Toby Fox, the Determination Symphony takes audiences on an emotional musical journey through the Underground, from the first steps among the Ruins to the final moments of the adventure

FOR IMMEDIATE RELEASE (August 25, 2026) – Ensemble Arts Philly and Mammoth Live present UNDERTALE: The Determination Symphony in Marian Anderson Hall inside the Kimmel Center for Performing Arts on Sunday, September 20, 2026, at 3:00 p.m. and 8:00 p.m. – an unforgettable concert experience featuring the most memorable themes from the hit indie game, newly arranged and performed live by a 25-piece orchestra.

"Some of today's most meaningful musical experiences are emerging from places audiences might not traditionally associate with the concert hall," said Frances Egler, Vice President of Theatrical Programming and Presentations. "UNDERTALE: The Determination Symphony demonstrates how unforgettable storytelling and extraordinary music can transcend mediums, bringing fans together through a shared appreciation for both. At Ensemble Arts Philly, we are committed to presenting experiences that reflect the many ways audiences engage with the arts today, and this concert offers a unique opportunity to experience the emotional power of UNDERTALE's music performed live in a symphonic setting."

With gameplay footage displayed on a screen above the stage, audiences will be fully immersed in the world of UNDERTALE, experiencing its story and music like never before. Concertgoers can look forward to being filled with determination as the performance guides them through the Underground. From the Ruins and Snowdin to Waterfall, Hotland, and finally New Home, the concert brings iconic characters, battles, and emotional moments vividly to life through music.

Tickets
Tickets can be purchased online at www.ensembleartsphilly.org, by calling 215-893-1999, or in person at the Academy of Music Box Office (240 S. Broad Street). For more information on the Academy of Music's Box Office hours, please visit www.ensembleartsphilly.org. 

UNDERTALE: The Determination Symphony
Marian Anderson Hall inside the Kimmel Center for Performing Arts
Sunday, September 20, 2026, 3:00 p.m. & 8:00 p.m.

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Other featured upcoming performances include ALOK: Eat Pray Leave Tour (September 4, 2026, Perelman Theater inside the Kimmel Center); R.F. Kuang – Taipei Story (September 11, 2026, Miller Theater); Shoshana Bean (September 16, 2026, Miller Theater); Sasha Velour – Travesty (September 17, 2026, Miller Theater); Brad Williams: The Tall Tales Tour (September 18, 2026, Miller Theater); Pat Metheny: Side-Eye III+ (September 19, 2026, Miller Theater); Anthony Jeselnik: Wrath of Man (September 25– 26, 2026); Brian Henson’s Puppet Up! (September 29, 2026, Miller Theater); and MAMMA MIA! (September 29–October 4, 2026, Academy of Music).

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ABOUT ENSEMBLE ARTS PHILLY
For more information about ENSEMBLE ARTS PHILLY, visit www.ensembleartsphilly.org.       

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For photography, please visit www.ensembleartsphilly.smugmug.com.


Click here for a PDF version of this press release.