Ready to vibe your way through a musical multiverse? MAJJAM, the debut title from newly formed Opus Major, invites players into an entirely new kind of co-op adventure — one where rhythm, harmony, and melody are more than just background music. They’re the core of everything.
Still early in development but already turning heads, MAJJAM fuses the connective joy of jam sessions with the energy of a multiplayer action game. Wishlist it on Steam now to be among the first to step into this living, breathing, musical world.
Welcome to the Jam
In MAJJAM, music isn’t just a soundtrack — it’s how you interact with everything. Exploration, combat, puzzle-solving, even movement — all of it is powered by your musical expression. You don’t need to know a single chord or scale; the game’s systems auto-harmonize player input, letting everyone feel like part of the band, regardless of musical experience.
At the heart of the experience is Jamming — the game’s core mechanic. Each character has their own instrument-inspired abilities and can unlock new musical powers as they progress. Whether you’re thumping out rhythms, weaving haunting harmonies, or laying down soaring melodies, you’re contributing to a living soundscape that can change the world around you.
The World is Alive — And So Is the Threat
Set in a bright, ever-evolving universe, MAJJAM’s environments literally react to your music. As players jam together, their performances reshape the land, open new paths, and reveal ancient secrets.
But not everything in this vibrant world is sunshine and syncopation. Lurking in the corners is Kodé — a creeping fog and corruptive force that silences everything it touches. It’s your main threat, a living environmental hazard that swallows areas whole and reshapes them into deadly, muted zones. Only by working together musically can players push back the fog tides and bring harmony back to the world.
Core Features
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Everyone Can Jam: No rhythm game mechanics, no musical knowledge needed — just jump in and create. Intuitive controls and latency-free online tech let every player contribute seamlessly.
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Dynamic Musical World: Your music matters. Shape and transform the world through jam sessions, and uncover hidden areas, puzzles, and powers as you play.
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Kodé: The Silence is Coming: Face off against an encroaching, mysterious fog that actively threatens player progress. Push it back with the power of your performance.
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Custom Characters, Custom Sound: Choose from a variety of instrument-themed avatars, each with their own musical style and gameplay abilities. Unlock new powers to enhance your musical range.
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Pure Social Harmony: Whether you’re vibing with friends or jamming with total strangers, MAJJAM aims to replicate the spontaneous, magical moments of real-world jam sessions.
A Jam for the World
Studio founders Pierre-Armand Nicq and Jean-Nicolas Vernin say it best:
“In music, a jam is a suspended moment — a shared energy between friends, strangers, and other passionate souls who just happen to be there. You might not know each other, but for a few magical, spontaneous moments, you vibe together.”
And that’s exactly the goal of MAJJAM — a living, collaborative musical experience that’s not about high scores or rhythm precision, but about creativity, expression, and harmony.
MAJJAM is currently in development. Wishlist it now on Steam and stay tuned for more info!
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