🇺🇸 英語版 (English)

🃏 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 manage a limited hand of cards to challenge infinitely scaling enemies.

✨ Three Key Features

• 💡 "Loop Calculation" – Strategy meets Inspiration Play 1 to 3 cards from your hand or stock 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.

• 🔄 Deck Building via the Chaos Market (Swap) When you defeat an enemy, you must swap one of your played cards with an unknown card from the market. Enjoy a dilemma-filled deck-building experience where the chance to gain powerful face cards comes with the risk of ruining your deck's balance.

• ♾️ The Despairing "Endless Battles (Ouroboros Sequence)" Defeat all 26 enemies to complete a loop. From loop 2 onwards, you must survive consecutive battles against a single enemy equal to your current loop number (with the target number increasing by +1 each time). 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, 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 "Swaps" 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!