About the Game

Experience a roguelite deckbuilder without energy or action points: there's no limit to how many cards you can play, as long as they fit! Every card is a sigil you place on a grid, each with its unique shape, keywords, and effects - turning each combat into a tactical optimization challenge.

Create powerful synergies through rune positioning, adjacency, overlap, and persistent effects. Place the right sigil at the right time to trigger devastating combos. Beyond spatial strategy, Moonsigil Atlas is about creative deckbuilding: draw infinite cards to deal infinite damage or make ten copies of your strongest card.

A fully modular, player-driven upgrade system. Every card can be modified as you see fit: reshape them, inscribe runes, add keywords, and more. Spread power across your deck or invest everything into a handful of unstoppable cards. With tens of thousands of possible combinations, even the simplest cards can become build-defining centerpieces.

With 250+ cards, alternate starting decks, unlockables, forbidden cards, 3 characters with radically different playstyles and a fully randomized map, every run offers new, game-breaking possibilities.

Battle dozens of astral entities and three Titans that reshape the board itself. Hostile zones, shifting grids, and unique win conditions turn every encounter into a test of adaptation and mastery. A powerful deck is only half the battle…
Screenshots
14 imagesVersion Information
Steam Patch Notes
Official update history
Hello Sigilwrights!
We've just pushed a small balance and bugfix update that includes an adjustment to the Act 3 boss, as well as fixes to a few rare bugs. Here is a list of everything that changed:
Changes
The Stargorger Titan is less punishing for decks that play lots of Gravel, Seeks, or Star Fragments. We're still keeping an eye on our gameplay stats and feedback to see if more significant changes are needed!
Aladara's starting health increased slightly from 53 to 58
Bugfixes
Fixed a softlock that could occur when playing Convergence on an empty board
Fixed a rare crash that could occur if the player's save data was somehow corrupted
Thanks again for all of your feedback and support!
Jeremy & Daniel
Snake Tower Games
Current Release
Build 24457943
Uploaded Oct 12, 2026
System Requirements
How to Install
Moonsigil Atlas.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
Download
Direct link available
Needed when extracting (WinRAR / 7-Zip) — not a site login.
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View AllDownload Moonsigil Atlas for PC with a direct link or via torrent. Get the full version of Moonsigil Atlas for free. Moonsigil Atlas is a Strategy released by Snake Tower Games.