About OPKA
OPKA celebrates timeless games that belong to everyone — solitaire in all its forms, dice classics, and memory games — rebuilt for the modern browser.
What we're building
OPKA is a free game arcade. No installs, no accounts required to play — open a game and go. Today the arcade includes seventeen games: ten solitaire variants (Klondike, FreeCell, Spider, Pyramid, TriPeaks, Yukon, Golf, Aces Up, Spiderette, Eight Off, Canfield, and Forty Thieves among them), Yahtzee, Farkle, Shut the Box, Simon, and our first OPKA original — Flock Block, a momentum side-scroller on rocket skates — with more on the way.
Fair leaderboards
Every game on OPKA uses server-verified scoring: the server deals the cards (or rolls the dice), and every submitted score is replayed move-by-move on our servers before it counts. If a score is on an OPKA leaderboard, it was actually played. Create a free account to claim your spot.
Free, supported by ads
OPKA is advertising-supported so the games stay free for everyone. Ads never cover the board or interrupt play. If you prefer, an ad-free upgrade will be available as a one-time purchase.
Get in touch
Found a bug, want a game added, or just want to say hello? Visit the contact page — we read everything.