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.

Every year, the Promax Awards celebrate outstanding achievements in entertainment marketing and design, honoring projects that have attracted audiences, created unforgettable experiences and helped turn viewers into devoted fans.
The jury is composed of marketers and creatives from leading European media organizations.
We received 3 Promax Awards for our work on the “Wall of Shadows” experience installed in Paris’ Saint Lazare train station for the launch of Disney+, in collaboration with The Walt Disney Company France.
Our Promax Awards (Gold Excellence, Gold and Silver) hold a special significance for us because they acknowledge our expertise, giving us further momentum to achieving our vision and expanding internationally:
“Building a world of experiential entertainment, limitless in subject matter, erasing the boundaries between the physical and the digital”.

SoWhen? were nominated as finalists for 2021’s Best Agency of the Year award by PromaxBDA!
Our projects with The Walt Disney Company France were also shortlisted for several other prize categories:
We created the interactive phygital experience by working with our own custom-made artificial intelligence (A.I.) and Epic Games‘ Unreal Engine, the realtime render engine with which we love creating the wildest experiences!
To learn more about The Wall of Shadows experience, click here to read our in-depth article.
The project was produced with the creative team of The Walt Disney Company France, our French-Tunisian team of SoWhen? and TaKoLoR International, our partners BOYS IN THE WOOD, BIG BANG, Let Me Know and in collaboration with some of the world’s best animation studios (Disney, Pixar, Marvel, National Geographic).


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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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