Harbinger's Sigil
Cosmic Horror Card Game
Free · Designed for iPad. Not verified for macOS.
Command eldritch horrors across dimensional rifts. Build decks, master runes, and sacrifice the weak to summon the unthinkable. The Sigil has chosen you.
The membrane between worlds is tearing. Beyond it lies the Elder Void — an infinite cosmic darkness teeming with entities that defy comprehension. You have been chosen. Branded with a Sigil, you alone can perceive the rifts and command the horrors that dwell within them.
Harbinger's Sigil is a collectible card game steeped in cosmic horror. Build decks of eldritch entities, forbidden rites, and ancient relics, then battle across dimensional rifts in fast, strategic matches where every sacrifice could tip the balance between salvation and annihilation.
RUNE-BASED COMBAT
Channel five primal Rune types — Void, Flesh, Mind, Star, and Shadow — to summon creatures and unleash devastating spells. Combine runes to unlock powerful Rites: merge Void and Void for Annihilation, weave Flesh and Star for Apotheosis, or twist Mind and Shadow into a Whisper of Madness. Mastering rune combinations is the key to victory.
THE 3-RIFT BATTLEFIELD
Each match unfolds across three dimensional Rifts — contested tears in reality, each warped by unique cosmic modifiers. Control two of three Rifts by the end of turn six to win. Rifts reveal progressively, forcing you to adapt your strategy as new battlefields tear open. Place Entities for raw power, deploy Relics for persistent advantages, and set Whispers as hidden traps for your opponent.
TRIBUTE SUMMONING
Sacrifice lesser creatures to call forth greater horrors. The tribute system creates agonizing decisions — your small entities serve as both fighters and fuel. Chain tributes to summon Elder-tier monstrosities like Azr'thul, the Unborn, whose arrival obliterates everything in its path. Every sacrifice triggers death abilities, turning loss into power.
FIVE FACTIONS, ENDLESS STRATEGIES
- The Sealed Order: Guardians of humanity who wield Star and Mind runes to protect and control.
- The Unraveled: Agents of chaos channeling Void and Shadow to accelerate reality's collapse.
- The Fleshweavers: Biomancers who reshape life itself through Flesh and Star.
- The Hollow Court: Seekers of forbidden knowledge through Mind and Shadow.
- The Rift Wardens: Keepers of balance between Void and Flesh, sealing and opening as needed.
CAMPAIGN MODE
Journey through five chapters as a newly awakened Sigil Bearer. Face the fanatical Commander Solenne, the nightmarish Frayed One, the grotesque Mother Viscera, the enigmatic Archivist, and ultimately the Harbinger itself. Each chapter features standard battles, elite encounters with modified rules, and climactic boss fights with unique mechanics. Earn new cards and unlock rune paths as you progress.
DECK BUILDER
Craft custom decks from your growing collection. Mix factions, experiment with rune combinations, and build around powerful tribute chains. Four card types — Entities, Rites, Relics, and Whispers — offer deep deckbuilding possibilities.
QUICK BATTLE
Jump into a match against the AI with your custom decks. Test strategies, try new builds, and sharpen your skills.
FEATURES
- Fully offline — no internet connection required
- No accounts, no logins, no data collection
- Painterly art style blending anime aesthetics with cosmic horror
- Strategic depth in compact 6-turn matches
- Over 30 unique cards at launch with more to come
From the studio that brought you Moai Legends. Built with care by CrashBytes.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Stability and performance improvements. Behind-the-scenes updates to support future enhancements. The Sigil sharpens — thank you for playing.
The developer, Michael Eakins, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Michael Eakins
- Size
- 56 MB
- Category
- Card
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Infrequent
Cartoon or Fantasy Violence
Mature or Suggestive Themes
Horror/Fear Themes
- Copyright
- © 2026 CrashBytes