Hellfest reveals its 2026 lineup and announces the release of ARTE Riff Mountain!
Hellfest announced the release date of ARTE Riff Mountain, coming on November 21st, 2025, and revealed its official cinematic trailer.

This year, SoWhen? returns to the Fest in a new format: we are joined by our client partners Valeo and Alstom for a roundtable discussion on the following theme: “Revolutionizing Brand Digital Heritage: Harnessing Unreal Engine for Innovation.”
Mohamed Marouene, our CEO and co-founder, Alexis Bonnet-Salkind, Advanced & Creative Design Director at Alstom, and Adeline Richon, Head of External Communication for the Group Business at Valeo, will share their insights and experiences on how Unreal Engine enables us to create and leverage brand digital assets.

For Which Audiences?
Unreal Engine users will gain a concrete understanding of how to optimally utilize created assets across various media and platforms. Experts in marketing, communication, innovation, design, and R&D from brands will discover how they can adapt their company’s assets to maximize return on investment.
Use Cases Presented:
Follow our news and discover the latest articles about our business, the market, the tips we offer you…
Hellfest announced the release date of ARTE Riff Mountain, coming on November 21st, 2025, and revealed its official cinematic trailer.
ARTE Riff Mountain will be featured at Paris Games Week, with an exclusive first demo available to the public.
After introducing the birth of the project in the first episode, this Dev Diary #2 dives into a key stage of the adventure: the conception phase.
SoWhen? was invited by SGA and EPIC to present a masterclass about our Multivert studio and a keynote on our co-production ARTE Riff Mountain.
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