- Version 0.37 - 7 September 2026
This update adds a CRT filter that recreates the look of a CRT display.You can turn it ON or OFF from the Config menu.CRT Filter: OFFCRT Filter: ONStandard displaySimulated CRT displayEnabling the CRT filter brings more of that classic arcade atmosphere to the game.My goal is to give this game an authentic arcade feel.However, the game does not feature nudity or stripping.Note: Many Japanese arcade hanafuda games feature opponents who remove clothing, such as kimonos, when you win. There are no plans to include this feature in this game. Ecchi na no wa ikenai to omoimasu!The CRT filter is also planned for the free demo in a future update.
- Version 0.36: Custom KoiKoi Rules in Online Battles - 12 August 2026
This update lets the room host configure rules equivalent to Custom KoiKoi when creating a Private Room in Online Battle.Other Match Types Keep Their Existing RulesOnline matches outside Private Rooms (Quick Match / Friends Match) will continue to use the following fixed rules:Rounds = 4Hand Cards = 8Field Cards = 8Hanami/Tsukimi = 5ptsKoiKoi Calls = OnceKoiKoi Scoring = StandardNetwork CompatibilityThis update changes the network protocol used for online play.As a result, Battle Hanafuda Version 0.35 and earlier cannot play online with Version 0.36 and later.If matchmaking does not complete successfully, please make sure both players have updated Battle Hanafuda to Version 0.36 or later.
- Version 0.35: Customizable Keyboard Mapping (keymap.ini) - 8 August 2026
This update adds customizable keyboard mapping.If you prefer WASD controls or use a Dvorak keyboard layout, give it a try!Where keymap.ini is savedAfter updating and launching the game, a keymap.ini file is automatically created in the game's installation directory. To open this directory, right-click the game in your Steam Library and select Manage → Browse local files.Edit keymap.ini to change the keyboard mappings.Configuration formatkeymap.ini defines one keyboard mapping per line in the format BUTTON = KEY.BUTTON valuesBUTTONDescriptionUPUp on the directional padDOWNDown on the directional padLEFTLeft on the directional padRIGHTRight on the directional padAA button (confirm)BB button (cancel)XX button (auxiliary button 1: fast-forward, etc.)YY button (auxiliary button 2: scoring-combination list, etc.)STARTSTART buttonKEY valuesKEYDescriptionA-ZLetter keys (A-Z)SymbolAn ASCII punct…
- Version 0.34: KoiKoi - Custom - 6 August 2026
We have added a new game mode, "KoiKoi - Custom," which lets you customize the rules of Koi-Koi.SettingsSettingDescriptionAISelect your opponent's AI behaviorRoundsSelect the number of roundsHand CardsSelect the number of cards in each player's starting hand (6/8/10)Field CardsSelect the number of cards in the starting field:When Hand Cards is not set to 10: 6/8/10/12When Hand Cards is set to 10: 6/8Hanami/TsukimiSet the points awarded for the sake yaku (Hanami-zake and Tsukimi-zake)5pts: Standard rules3pts: Reduced points0pt: Disable these yakuKoiKoi CallsSet how many times Koi-Koi may be called:Once: Once per round (standard rules)Multiple: Any number of times per roundKoiKoi ScoringSet the scoring bonus applied when Koi-Koi is calledStandard: If a player calls Koi-Koi and then loses the round, the opponent's score is doubled (standard rules)Rising Stakes: Each Koi-Koi call increases…
- We're Considering a Customizable Koi-Koi Rules Mode - 30 July 2026
We're currently considering adding a new game mode, "KoiKoi - Custom," that will let you customize the rules of koi-koi.The customization options currently under consideration are:Opponent difficulty: Normal / HardNumber of rounds: 2 / 4 / 6 / 12Cards in the starting hand: 6 / 8 / 10Cards on the table at the start: 6 / 8 / 10 / 12 (6 or 8 when starting with 10 cards in hand)Sake yaku score: 5 points / 3 points / Disabled (0 points)Koi-koi declarations: Once (one declaration only) / Multiple (multiple declarations allowed)Koi-koi scoring: Standard (if the player who was called against wins, their score is doubled) / Rising Stakes (the winner's score is doubled, regardless of who declared koi-koi)When Rising Stakes and Multiple are combined, we're considering a rule where the multiplier increases with each koi-koi declaration: ×2 → ×4 → ×8 → ×16, capped at ×16 from the fourth declaration…
- Version 0.33 - 16 July 2026
This update applies only to the macOS and Linux versions. On these platforms, the game uses SDL2 to render a 640×400 texture to the screen at 60 FPS. We discovered that the texture buffer (framebuffer) was incorrectly allocated for only 399 rows (640×399), and have fixed the issue. This bug could cause crashes and other problems. We believe this update resolves them, but since we do not have access to hardware on which the issue can be reproduced, we cannot guarantee that the fix is complete. If you encounter any further issues, we would greatly appreciate it if you could report them on the Community forum.
- Version 0.32: HanaKlo Achievements - 14 July 2026
This update includes the following changes:Added new Hana Klo achievementsImproved rendering performance in the Arcade Mode map sceneNew Hana Klo AchievementsThree new achievements have been added to Hana Klo, based on your total accumulated EXP:Beginner — Reach 50,000 total EXPIntermediate — Reach 100,000 total EXPAdvanced — Reach 200,000 total EXPI considered adding achievements with a wider variety of requirements, but for this first set, I decided to focus on long-term goals that reward players for continuing to play. For that reason, these achievements are currently based solely on total accumulated EXP.Once you get the hang of it, the Beginner and Intermediate achievements should be relatively easy to unlock, but the Advanced achievement may prove more challenging.For reference, during debugging, it took me 145 plays—or roughly nine hours—to unlock it.Rendering Performance Improve…
- Version 0.31: HanaKlo Now Includes an Experience System - 10 July 2026
In this update, we've added a new Experience System to HanaKlo, giving players a greater sense of long-term progression the more they play.You can check your current experience on the results screen after clearing a game of HanaKlo.Experience is calculated based on the following factors:Clear CountBest TimeBest MovesYaku CountTotal Play TimeEach game mode (Assist / Standard / Expert) applies different experience multipliers. Expert mode rewards significantly more experience in less time than Assist mode.While viewing the results screen, press Y (or S on keyboard) to see a detailed breakdown of your Yaku Count.If you ever find yourself thinking,"I'm not earning much experience..."try challenging yourself to complete Yaku in the Slots.While HanaKlo may feel a little easier than traditional Klondike during normal play, completing Yaku in the Slots is much more challenging and depends heavi…
- Version 0.30: Hana Klo Adds Assist & Expert Modes - 8 July 2026
In this update, Hana Klo has been divided into three play modes: Assist, Standard, and Expert.ModeDescriptionAssistHighlights all valid destinations for the card under your cursor.StandardThe original gameplay mode.ExpertHides the month number (1–12) and card value (1 / 5 / 10 / 20) shown in the upper-left corner of each card.Assist ModeHighlights all valid destinations for the card currently under your cursor.This makes it easy to see both which cards can be moved and where they can be moved, allowing beginners to learn the rules more intuitively.Expert ModeDesigned for advanced players who have completely memorized every card's month and point value.Once you become comfortable with this mode, you'll also find it much easier to enjoy Hana Klo using a real Hanafuda deck.Coming SoonThis feature is not implemented yet, but I'm considering adding a long-term progression system that rewards…
- Version 0.29 - 8 July 2026
Fixed an issue where the "Cannot move!" dialog would not disappear after replaying a leaderboard replay in Hana Klo.
- Battle Hanafuda plays great on SteamDeck - 7 July 2026
Battle Hanafuda plays great on Steam Deck.Key Features:Optimized for the Steam Deck's native 1280×800 display32×32 pixel-based font design for excellent readability on the handheld screenFull gamepad and touchscreen support — no mouse or keyboard requiredOn-screen prompts match the Steam Deck's ABXY button layout (e.g. "Press \ Button")Native Linux support — no Proton requiredPowered by a lightweight custom game engine built on SDL2 (VGS-X)Lower battery/storage consumption than typical games built with engines such as Unreal Engine or UnityRendering is limited to just two polygons and a single texture at any given time, minimizing GPU workload and power consumption.MC68k-based code and VGM (YM2612) audio deliver an exceptionally small installation size of just around 10 MB
- Version 0.28 Hana Klo Update - 5 July 2026
In this update, we've made several gameplay adjustments and added new features for Hana Klo.Updated the stacking rules for RowsAdded yaku detection for SlotsAdjusted when the timer startsAdded a LeaderboardAdded an in-game Rule Book1. Updated the stacking rules for RowsBeforeAfterStacking Kasu cards on Kasu cards was prohibited.Stacking cards of the same category (Kasu / Tan / Animal / Bright) is prohibited.This change brings the difficulty closer to that of the original Klondike.2. Added yaku detection for SlotsWhen a Koi-Koi yaku is completed in the Slots (upper-left corner of the screen), its name is now displayed.This is a visual enhancement only and does not affect the gameplay rules.This feature will also be used for the Hana Klo achievements planned for a future update.3. Adjusted when the timer startsBeforeAfterThe timer started immediately.The timer starts when you make your fi…
- Version 0.27 Hana Klo (beta) - 3 July 2026
Content Added & ChangesThis update includes the following new content and improvements:Added Hana Klo (beta) to Free PlayAdded Stage 5 Introduction to the Music RoomImproved the Free Play navigation flowHana Klo (beta)Hana Klo (Hanafuda Klondike) is a solitaire (single-player card game) played with Hanafuda cards.Just like traditional Klondike played with standard playing cards, the game consists of Rows, Deck, Opened, and Slots. Fill all Slots with cards from January through December to clear the game.TerminologyNameDescriptionRowsSeven columns containing 1, 2, ... 7 cards from left to right. The top card in each column is face up.DeckThe face-down draw pile in the upper-right corner.OpenedCards drawn from the Deck.SlotsThe card slots in the upper-left corner. Fill them with cards from January to December in order to win.RulesSelect a card with the A Button (Left Click).X Button: Draw…
- Version 0.26: Added Stage 5 Music - 27 June 2026
This update includes the following changes:Added the Stage 5 theme, "Reigen's Theme"Reorganized the Free Play menuImproved the default leaderboard page behavior1. Added the Stage 5 Theme: "Reigen's Theme"Stage 5 features a horror-themed setting.So I composed a ghost-inspired theme for it.Although Stage 5 has not yet been implemented in Arcade Mode, you can already listen to the track in the Music Room.I think it turned out pretty well, though it may sound a bit more like Dracula than a ghost.Still, they're both broadly supernatural, so I suppose it's close enough!2. Reorganized the Free Play MenuThe Free Play menu has been separated from the title screen's main menu.Main MenuFree Play MenuThis change will make it easier to add new game modes in future updates.There are no concrete plans yet, but I'm considering expanding the variety of games you can play.3. Default Leaderboard PageThe d…
- Version 0.25: Mini Update - 20 June 2026
This mini update includes several improvements, such as smoother card animations and additional map details.Improved card movement (transition)Added the ship (Kan'ei Maru) NPC to the road between Stage 1 and Stage 2Other minor fixes(1) Improved Card MovementI've adjusted the initial acceleration of card animations based on the distance between the starting and ending positions.Cards that travel only a short distance now move more gently, while cards traveling farther move more quickly, making the perceived animation time feel more consistent.(2) Ship NPCBattle Hanafuda includes a custom RPG engine called Sungeki Engine, which is used to implement the map traversal sequences between stages in Arcade Mode.You can think of it as something similar to RPG Maker, except it's built in VGS-X (C).By adding support for NPCs (Non-Playable Characters) to Sungeki Engine, I was able to place the ship…
- Version 0.24: Oicho-Kabu Free Play Now Available - 13 June 2026
In this update, Oicho-Kabu's "Test Mode" has been promoted to "Free Play".Along with this change, we have added new achievements and a leaderboard.New AchievementsTriple ArashiWin with the special hand "Triple Arashi" (months other than April and September) in Oicho-Kabu.Quadruple ArashiWin with the special hand "Quadruple Arashi" (April or September) in Oicho-Kabu.Hanami SakeWin with the special hand "Hanami Sake" in Oicho-Kabu.Tsukimi SakeWin with the special hand "Tsukimi Sake" in Oicho-Kabu.Red Poetry RibbonsWin with the special hand "Red Poetry Ribbons" in Oicho-Kabu.Blue Poetry RibbonsWin with the special hand "Blue Poetry Ribbons" in Oicho-Kabu.Ino-Shika-ChoWin with the special hand "Ino-Shika-Cho" in Oicho-Kabu.Three BrightsWin with the special hand "Three Brights" in Oicho-Kabu.LeaderboardsA new leaderboard for Oicho-Kabu has been added.Press Detail (A / × / Z) to watch replays.
- Version 0.23 Oicho-Kabu Update - 8 June 2026
In this mini update, we've made several improvements to Oicho-Kabu (Public Beta).Added the new winning hands "Hanami-Sake" and "Tsukimi-Sake"Added a replay confirmation after the game endsFixed minor issuesAdded "Hanami-Sake" and "Tsukimi-Sake"We have added the new hands "Hanami-Sake" and "Tsukimi-Sake", which are formed by combining the September Seed card (Sake Cup) with either the March Bright card (Cherry Blossom) or the August Bright card (Moon).These hands have been balanced to be stronger than Arashi, but weaker than Akatan.Since they can be completed with only two cards, their reward multiplier is set to 4x, slightly lower than the 5x multiplier used for other Koi-Koi hands.Added a Replay ConfirmationIn previous versions, the game would immediately return to the title screen after a match ended, making it somewhat inconvenient to start another game.This has been improved by addi…
- Version 0.22 - Oicho Kabu (Test) - 7 June 2026
We've added a Public Beta for Oicho-Kabu, a bonus game planned for Stage 4 (Bonus Stage) of Arcade Mode, so you can try it out ahead of its full implementation.How to PlayYou can access it from "\ Oicho Kabu" on the title screen.Please note that this mode is currently a test version, and its rules and balance may change in future updates. At the moment, we plan to remove this menu option once Arcade Mode is fully completed.However, we're also considering keeping it as a permanent Free Play mode, since we've already put the work into implementing it.If you have any feedback or suggestions, we'd appreciate hearing from you in the discussion forum:https://steamcommunity.com/app/4161340/discussions/Rule ReferenceYou can review the rules from: Configuration → Oicho-Kabu Rule Please note that Oicho-Kabu has many regional and house-rule variations, and there is no single standardized ruleset.A…
- Stage 4 (Oicho-Kabu) Development Update - 1 June 2026
We are currently developing "Oicho-Kabu," the bonus stage for Stage 4.Oicho-Kabu is a traditional Japanese card game that feels somewhat like a cross between Baccarat and Blackjack, played with Hanafuda cards.*Since the game only uses the numbers 1 through 10, it can also be played with a standard deck of playing cards.We have uploaded an unlisted YouTube video showing the current work in progress.(Note: Audio has not been added yet.)Basic RulesThe goal is to compare the last digit of the total value of two or three cards.The Player wins by having a higher number than the Dealer.There are also several special hands.Hand TypesThere are ten standard hands determined by the last digit of the total card value.Buta: 0Pin: 1Nizo: 2Santa: 3Yotsuya: 4Goke: 5Roppo: 6Shichiken: 7Oicho: 8Kabu: 9In addition to the standard hands, there are also special hands.Many local variations of Oicho-Kabu exis…
- Version 0.21 (patch) - 23 May 2026
Arcade Mode scores were incorrectly being submitted to the following leaderboards. This issue has now been fixed. Stage 1 → Normal / 4 Rounds Stage 2 → Normal / 4 Rounds Stage 3 → Normal / 6 Rounds
