Ouroboros Solitaire

Ouroboros Solitaire is an endless deck-building card game in which you manage limited resources to face enemies whose numbers scale without limit. You can also play its rules with a standard deck of 52 cards and one Joker.

Match enemy numbers

Play up to three cards from your hand to match an enemy’s number. If their total exceeds 13, subtract 13; for example, 14 becomes 1. You need to find flexible combinations, including adding around when subtraction is not enough.

Manage your deck

The game ends as soon as your deck runs out, so every card spent matters. Form poker-style hands such as a Straight or Flush to defeat enemies instantly and recover your deck. You can also spend cards from your deck to bribe enemies and recruit them.

Special cards and loops

Face cards (J, Q and K) have special effects, including reorganizing your deck or granting permanent advantages called Laws. Defeat all 26 enemies to complete a loop. From the second loop onward, you must match numbers against a single enemy consecutively a number of times equal to your current loop number.

Automated play

The digital version handles card placement, shuffling, Loop Calculations, Hand Bonus detection and consecutive win streaks. Its rules can also be played offline with a physical deck.