Play free. Right now.

No. There is no signup, no email and nothing to install — every game runs in your browser as soon as the page loads. There are also no ads, no coins, no energy timers and no paywall on the harder bot levels: every difficulty, every analysis tool and every multiplayer room is free.

Open any multiplayer game and share the four-letter room code it gives you. Your friend opens the same game and enters that code, and you are in the same room. Neither of you needs an account, an invite or an app.

Because you can check them yourself. Before the first move the game publishes a SHA-256 hash of its server seed, and when the game ends it reveals the seed. Roll i is derived from SHA-256(server : client : i : counter), and each byte becomes a die with (byte mod 6) + 1 — bytes 252 to 255 are discarded, because 256 is not divisible by 6 and keeping them would make low faces slightly more likely. Because the seed is committed before you play, the dice cannot depend on the score, the board, or how well you are doing. Paste the receipt into the dice verifier and it recomputes every roll from scratch; if a single die had been changed, the check fails. Our SHA-256 is plain readable JavaScript, checked against the vectors published in NIST's FIPS 180-4 so you can confirm it is the real thing.

Classic strategy: chess, Chess960, go, shogi, xiangqi, backgammon, checkers, reversi, gomoku, Nine Men's Morris, Chinese checkers, mancala and Connect 4. Card games: bridge, hearts, spades, rummy, gin rummy, pinochle, double deck pinochle, canasta, euchre, cribbage and crazy eights. Solitaire and puzzles: Klondike, FreeCell, sudoku, minesweeper, nonogram, mahjong solitaire and hangman. Plus originals built here — LEXEME, OVERRUN, CLASP, ANTE, MOGUL, OUTPOST, HOLESHOT and QUINT.