Cthulhu Realms

In-app purchases
Content rating
Rated for 3+
100K+
Downloads
Content rating
Rated for 3+
Users Interact, Digital Purchases
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About this game

Star Realms has gone insane! Introducing Cthulhu Realms! Are you zany enough to play the crazier and creepier cousin of Star Realms?

Download and play today to find out why Cthulhu Realms is so crazily addictive!

In Cthulhu Realms, each player tries to drive their opponent insane or have more sanity than their opponents when the deck runs out.

“Cthulhu Realms plays a lot quicker than most other deckbuilding games that I’ve played.” Roll for Crit

"I had a good time with this. I enjoy. I give it two insane people's screams up" - The Dice Tower

How to Play the Game:
Each player starts the game with a small deck comprised of initiates, goons and followers. Five cards from the deck form a row of available cards on the table; with more than two players, place three available cards between each pair of players.

Each turn, you start with five cards in hand, playing those cards in order to put locations into play, boost your own sanity or reduce that of others, collect conjuring power to acquire new cards, and remove cards from the game. You can use the power of your locations once each turn. At the end of your turn, discard any cards still in hand and all entities and artifacts that you played.

If you lose all of your sanity, you're out of the game. If you're the only one at the table who's still sane, you win. Otherwise, the game ends when the deck runs out and whoever has the most sanity wins.

Darwin Kastle is the designer of the popular Star Realms Deckbuilding Game, and with the digital release of Cthulhu Realms, he once again provides tons of playability for free, and a one-time upgrade to be able play with your friends and more on any device.

Free Version

• Drive people insane everywhere - play across devices.
• Crazyily addictive deckbuilding game.
• Tutorial teaches you how to make people crazy in minutes.
• Awesome, comical art.
• Play VS the AI.
• 8 silly campaign missions!

Full Game Additional Features

• Play the AI on 2 different difficulty settings.
• 8 more fun campaign missions.
• Battle your friends face to face with Pass and Play.
• Play against many more opponents online.
• Challenge a friend to online Player v Player combat

Cthulhu Realms is also available at your local game store as a physical card game from Tasty Minstrel Games.
Cthulhu Realms is the creepier cousin of the hugely popular game Star Realms.
Updated on
Sep 6, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info and Device or other IDs
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Bug fixes:
-Campaign text not displaying properly