PARIS, April 30, 2026—Moonsigil Atlas, a jam-born deckbuilder from Snake Tower Games and Twin Sails Interactive, gets its biggest update yet ahead of launch on Steam on May 28, 2026. Alongside today’s release date announcement, the team is also unveiling a fully updated demo and a new gameplay showcase trailer giving players the clearest look yet at what Moonsigil Atlas really is and how it feels to play. Wishlist on Steam now and dive into the updated demo today.
Watch Moonsigil Atlas' New Gameplay Trailer!
In Moonsigil Atlas, your true resource is physical space. There is no energy, no mana, and no action point cap. Players can cast as many cards as they want, as long as they fit on the board. Every card is a sigil with its own shape, keywords, and effects, turning each battle into a tactical challenge of placement, timing, and optimization.
DECKBUILDING MEETS TILE PLACEMENT
Every turn in Moonsigil Atlas is a test of both spatial strategy and creative deckbuilding. Players build power through rune positioning, adjacency, overlap, and persistent effects, placing the right sigils at the right time to trigger devastating combos. Beyond the puzzle-like challenge of fitting cards onto the grid, the game encourages wildly expressive builds — from infinite draw loops to decks built around a single unstoppable card. The result is a game that fuses the depth of a deckbuilder with the satisfaction of a spatial puzzle.
FACE COSMIC DIVINITIES
Players will battle dozens of astral entities and confront three powerful Titans that can reshape the board itself. With hostile zones, shifting grids, and encounter-specific win conditions, every fight demands adaptation as much as raw power. In Moonsigil Atlas, building a strong deck is only half the challenge.
FEATURES
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No energy. No mana. Just space: Cast as many cards as you want, as long as they fit on the board
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Deckbuilding meets tile placement: Build devastating synergies through adjacency, overlap, rune positioning, and persistent effects
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A fully modular upgrade system: Reshape cards, inscribe runes, add keywords, and transform your deck your way
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250+ cards and thousands of build paths: Discover huge variety across unlockables, alternate starts, and randomized runs
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Three distinct characters: Master radically different playstyles across Feldryn, Aladara, and Tark’thul
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Cosmic enemies and board-altering bosses: Face astral entities and Titans that change the rules of each encounter
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Built for expressive, replayable strategy: Every run offers new ways to push synergies, combos, and creative deckbuilding to the limit
BORN IN A GAME JAM, BUILT FOR THE LONG RUN
Originally inspired by Fallowtide, a winning prototype the devs built for Ludum Dare 52, Moonsigil Atlas grew from a game jam concept into a full commercial release built around one standout idea: in this deckbuilder, your most important resource is not energy, but space.
Moonsigil Atlas launches on Steam on May 28, 2026. Wishlist the game now, and try the newly overhauled demo for a closer look at the final experience. Follow on X, Instagram, and Discord to receive the latest updates, and stay tuned for more exciting news from Twin Sails about their growing lineup of indie gems. Follow them on X, Instagram, or Facebook.
In case you missed it, Twin Sails recently announced Ascenders: Beyond the Peak, Sky Dust, and Wind Runners joining its portfolio. Don’t forget to check those games out too!
About Twin Sails Interactive
Twin Sails Interactive is an independent international video game publisher, formerly part of Asmodee Group. Our passionate team collaborates with talented developers to bring unique and engaging experiences to players worldwide. Originally known for digital board game adaptations as Asmodee Digital, Twin Sails Interactive has since expanded into publishing original and creative titles across PC and consoles. With successful releases like Gloomhaven and Ember Knights, we continue to champion indie gems such as Survival: Fountain of Youth, Bloomtown: A Different Story, News Tower, Ascenders: Beyond the Peak, Sky Dust, Moonsigil Atlas, and Wind Runners. Learn more at www.twin-sails.com, and follow us on X.
About Snake Tower Games
Snake Tower Games is a small American studio focused on hand-crafted, mechanically innovative games. Founded in 2024 by Daniel Alhadeff and Jeremy Ryan, Snake Tower's debut title Moonsigil Atlas combines their love of card games, video games, and creating unique experiences by breaking the mold of established genres.