In-game event

Version 0.34: KoiKoi - Custom

Battle Hanafuda · published 34 days ago · build 24587134

All events Players around this date Read on Steam

We have added a new game mode, "KoiKoi - Custom," which lets you customize the rules of Koi-Koi.

Settings

Setting

Description

Select your opponent's AI behavior

Rounds

Select the number of rounds

Hand Cards

Select the number of cards in each player's starting hand (6/8/10)

Field Cards

Select the number of cards in the starting field:

When Hand Cards is not set to 10: 6/8/10/12
When Hand Cards is set to 10: 6/8

Hanami/Tsukimi

Set the points awarded for the sake yaku (Hanami-zake and Tsukimi-zake)

5pts: Standard rules
3pts: Reduced points
0pt: Disable these yaku

KoiKoi Calls

Set how many times Koi-Koi may be called:

Once: Once per round (standard rules)
Multiple: Any number of times per round

KoiKoi Scoring

Set the scoring bonus applied when Koi-Koi is called

Standard: 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 the score multiplier for both players

Special Combination (Multiple + Rising Stakes)

When KoiKoi Calls is set to "Multiple" and KoiKoi Scoring is set to "Rising Stakes," each Koi-Koi call increases the score multiplier to 2x (first call), 4x (second call), 8x (third call), and up to 16x (fourth call).

If the double-score rule for scores of 7 points or more also applies, the score multiplier can reach a maximum of 32x.

A single yaku can be worth more than 200 points, making for a thrilling match.

The "Multiple + Rising Stakes" combination is generally best suited to shorter matches.

You can also use it in longer matches, but they may take considerably more time to complete.

Other announcements

All events

In-game event7 Sep 2026Version 0.37This 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: OFF CRT Filter: ON Standard display Simulated CRT display Enabling 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 J…In-game event12 Aug 2026Version 0.36: Custom KoiKoi Rules in Online BattlesThis 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 Rules Online matches outside Private Rooms (Quick Match / Friends Match) will continue to use the following fixed rules: · Rounds = 4 · Hand Cards = 8 · Field Cards = 8 · Hanami/Tsukimi = 5pts · KoiKoi Calls = Once · KoiKoi Scoring = Sta…In-game event8 Aug 2026Version 0.35: Customizable Keyboard Mapping (keymap.ini)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 saved After 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…