Battle Hanafuda

Battle Hanafuda brings the traditional Japanese card game Hanafuda to video game form. You can play Koi-Koi, Oicho Kabu and Hana Klo, with guidance designed to help beginners learn as they play. Hand highlights, automatic card recognition and visual cues show when you are one card away from a scoring hand.

Game modes

Free Play includes Koi-Koi, Oicho Kabu and Hana Klo. Koi-Koi uses Nintendo-style rules, with an optional No-Sake variation; Oicho Kabu is a blackjack-inspired game played with Hanafuda cards, and Hana Klo is a Klondike-inspired solitaire game. The in-game Configuration menu provides detailed rules for each game.

Arcade Mode is a stage-based single-player mode. You earn money by winning matches and spend it to continue after a defeat, managing your resources as you try to clear every stage. Its current beta includes stages 1–3.

Watch Mode lets you spectate matches between the Normal and Hard AI. Recent match logs include metrics showing why the Hard AI chose each move. Hard Mode also lets you play against a stronger AI, while Custom Mode offers flexible rules. No-Sake Mode disables the Sake Cup card in CPU matches.

Online multiplayer

Online Koi-Koi supports Quick Match against a random opponent, Friends Matches with people on your Steam Friends list, and private rooms. You can create a room with any 6-character code and share it with others, or enter a code to join a room. The game records the results of your last 12 online matches and lets you view opponents' Steam profiles. To keep matches moving, online play disables pausing and the hand list, and inputs have a time limit.

Music and rules

The Music Room lets you preview the soundtrack, powered by the YM2612 (OPN2) sound chip used in the VGS-X platform, while viewing a piano-style keyboard display. An in-game rule reference covers Koi-Koi, Oicho Kabu and Hana Klo.