At the Future Games Show: Best of gamescom 2025, Paris-based studio Opus Major unveiled a new musical gameplay trailer for MAJJAM, highlighting the first musical mechanics at the heart of this upcoming cooperative PvE adventure.

In this immersive and harmonious musical trailer, the music emanates from jam cards, the unique musical powers wielded by the heroes of MAJJAM. By playing music together using these jam cards, the characters generate protective energy that repels the evil presence of the antagonist and his deadly fog.

This first glimpse of MAJJAM is sure to thrill music-loving gamers around the world-players can sign up for an upcoming playtest today and add the game to their wishlist on Steam.



The world of MAJJAM is in danger. An evil force, Kodé, is slowly spreading its deadly and silent grip. To protect their world and save their lands, players must unite and face the dangers and challenges that threaten the universe.

Their weapon? Music.

MAJJAM is not a rhythm game, and no musical skill is required to play. As the heroes use their powers to explore and defend the world, each interaction generates melodies and rhythms in real time. The game's technology auto-harmonizes all player performances, online and with no apparent latency.

Each note played is a spark, each harmony rediscovered is a glimmer in the darkness. Because in this story, music is not just entertainment: it is the force of the world. A weapon. The light that drives back the darkness.

Hero jam cards offer a system of musical abilities that players can unlock, collect, and keep throughout their adventure. Each ability has a specific power that further expands the range of skills available to players, allowing them to influence and explore their environment.

Created by a team of developers with their own musical talents and inspired by their own jam sessions, MAJJAM is an ode to the collective power of music and video games!

Key Features of MAJJAM

• Save the world through the power of music
• The joy of jamming, accessible to all
• Explore a world full of wonder

To stay up to date with the latest news about MAJJAM, join our community on Discord, add the game to your wishlist on Steam, and follow the game on TikTok, X, and Instagram.