Moonsigil Atlas

Roguelike deckbuilder where board space replaces energy as your limit

Snake Tower Games · Published by Twin Sails Interactive · Released May 28, 2026

Reviews: Very Positive; 82% of 286
Recent reviews: Very Positive; 84% of 19 in 30 days
Players: 4; daily peak, Oct 28, 2026
Steam Deck: Verified
Last update on Steam: 2 months ago; Jul 29, 2026
Minimum PC: (R); 2 GB disk; Full requirements

What is Moonsigil Atlas?

A turn-based roguelike deckbuilder about battling astral entities across a randomized map. You place shaped sigil cards on a grid and combine their effects through adjacency and overlap. Titan enemies can reshape the board and introduce different win conditions.

For you if...

+you like modifying individual cards to build powerful combos
+you enjoy learning characters with distinct playstyles

Not for you if...

−you prefer relaxed combat without constant spatial planning

What players say

82% of 286 reviews are positive · 84% of 19 in the last 30 days

Players praise the spatial card system and the range of possible builds. Some find rotating and fitting pieces mentally tiring, while encounter balance also draws criticism.

Screenshots and trailer

Moonsigil Atlas system requirements

Minimum: (R), 2 GB of disk space.

As published by the developer.

Can my PC run Moonsigil Atlas?

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Minimum

OS: Windows 10/Windows 11
Processor: Intel Dual Core @ 2.5 GHz or higher (or AMD equivalent)
Graphics: Intel(R) Graphics
Storage: 2 GB available space
Notes: 1080p, Low Settings

Does Moonsigil Atlas have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Moonsigil Atlas run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows, Linux
Achievements: 31
Steam features: Cloud saves, Family Sharing
Languages: Text only: English, Russian, Japanese, Korean, Simplified Chinese, French, German, Spanish - Spain, Portuguese - Brazil, Spanish - Latin America, Traditional Chinese, Polish.

Does Moonsigil Atlas use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam