🃏 Fully playable with a real deck of cards! But first, let the app teach you the rules!

A new solitaire experience blending refined analog aesthetics with digital convenience.

Ouroboros Solitaire is an "endless deck-building" card game where you circulate limited resources to challenge infinitely scaling enemies.

✨ Key Features

💡 "Loop Calculation" – Strategy meets Inspiration Play up to 3 cards from your hand to match the enemy's number. If the total exceeds 13, subtract 13 (e.g., 14 becomes 1). This system requires flexible puzzle-solving skills, like "adding to loop around" when subtraction isn't enough.

🔄 Resource Circulation via "Hand Bonuses" and "Bribes" Featuring new poker-style "Hands"! Form a Straight or Flush to instantly defeat enemies and recover (circulate) your deck. You can also spend cards from your deck to "Bribe" enemies and recruit them. With the game ending the exact moment your deck runs out, enjoy the dilemma of severe resource management.

👑 "Special Cards" that Overturn the Battle Face cards (J, Q, K) now act as special cards that provide powerful effects , such as deck reorganization or granting permanent advantages (Laws), allowing for even deeper deck-building strategy.

♾️ The Despairing "Endless Battles (Ouroboros Sequence)" Defeat all 26 enemies to complete a loop. From loop 2 onwards, you must successfully match numbers against a single enemy consecutively equal to your current loop number. How long can you survive the ever-inflating pressure of these endless battles?

💻 Overwhelming Immersion Unique to the Digital Version

The most remarkable aspect of this game is its highly refined ruleset—you can enjoy the exact same game offline using just a standard deck of 52 cards + 1 Joker. However, this Steam version is the definitive way to play in the most comfortable environment. The system automatically handles all complex mechanics at a pleasant tempo, including card placement, shuffling, instantaneous Loop Calculations, Hand Bonus detection, and managing your consecutive win streaks. Players can simply immerse themselves purely in "strategy" and "extreme score attacking".

🎮 If the rules seem complex, just try playing the app!

If reading about "Loop Calculations" and "Hand Bonuses" makes it sound a bit difficult... don't worry! The system comfortably handles all the tedious math for you. Once you start playing, the rules will intuitively click, and you'll find yourself hooked in no time.

Take your time and enjoy the tactile feel of physical cards, or dive into the fast-paced, extreme score attack of the Steam version. The endless swamp of solitaire awaits you.

Detailed rules are available in the manual (PDF) on Steam. Please feel free to refer to this manual even when playing with a physical deck of cards.

Please try playing the app first to experience this new sensation for yourself! And if you enjoy the game, adding it to your [Wishlist] would be a huge encouragement for our development and keep you updated on future news!