Battle Hanafuda is a video game first published on Steam Early Access in 2026, developed and self-published by Yoji Suzuki from SUZUKI PLAN. It is available for Windows, Mac, and Linux/SteamOS.
Battle Hanafuda is a 16-bit retro game for playing Koi-Koi. Both single player and online multiplayer game modes are included. The game stays close to Nintendo’s Koi-Koi rules.