In most deckbuilders, power is rationed by energy. In Moonsigil Atlas, your true resource is physical space. Every turn is spellcraft by geometry: you place sigil-cards onto a moon-tile board, then build power through adjacency, overlap, and precise positioning. If it fits, it casts. 

The art of reading the board, shaping your cards to fit it, and bending the geometry of magic sigils to your will.

That single twist turns each fight into a genuine puzzle. You’re not just choosing what to play, but you’re choosing how to inscribe it into your casting circle. The result is a deckbuilder that rewards thinking like a builder: how you arrange your sigils in the moment, which sigils are you going to draw next, and how you've sculpted them beforehand.

In Moonsigil Atlas, card crafting happens differently; your deck doesn’t merely get bigger — it mutates. Upgrades let you reshape sigil geometry, carve runes into your toolkit, and evolve your build into something uniquely yours. That progression loop is the hook: every run teaches you a new trick, then dares you to go back in and break tougher enemies with it.

Moonsigil Atlas is playable via a free demo on Steam as part of Steam’s Turn-Based Thursday Fest (March 9–16).

Key Features:

• No energy — space is your resource: Play as many cards as you want, as long as they fit on the board.
• Geometric spellcasting: Trigger synergies through adjacency, overlap, and positioning for massive combo chains.
• Card crafting (not just stat upgrades): Reshape card geometry, inscribe runes, add keywords, and fundamentally transform your deck’s behavior.
• One-more-run progression: Each run unlocks new tools, new routes, and new ways to build something unreasonably powerful.
• Built for endless replayability: With 3 characters, each with several unique playstyles; 200+ cards with thousands of possible upgrades and unlockables; 
• Face cosmic divinities: Harness the power of the sigil to take down the three Astral Titans, defeating 40+ enemies and epic bosses
• Striking hand-painted visuals, immersive without ever getting in the way: Cosmic light, stylized spellwork, and the tactile feel of a beautifully illustrated card game.

Moonsigil Atlas is coming to PC (Steam) in June 2026.