Ouroboros Solitaire

The release date for Ouroboros Solitaire is July 15, 2026, on PC. This indie strategy title translates a physical card game concept into a digital deck-builder centered on resource circulation and modulo 13 math. Players must match enemy numbers by playing cards from a hand that doubles as their health pool; if the deck runs dry, the run ends immediately.

The loop calculation system is the standout mechanic here, requiring you to add values and subtract 13 to hit precise targets. While you can win through standard arithmetic, high-level play relies on forming poker-style flushes and straights for instant kills or bribing enemies to join your ranks. It is a focused, math-heavy puzzle for those who want a card game that values strict resource management over flashy RNG. Buy this if you want a digital solitaire variant that you can realistically learn and play with a physical deck of cards at home.