さんよん ~三女?四対!~

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About

Unlock Cosplay Costumes by Battling Girls in an Original Mahjong-Inspired Game!

San-Yon: Third Daughter? Four Tiles! is a mahjong-style board game where you engage in one-on-one matches against three girls, each with a unique playstyle. Win a match, and you'll unlock a special cosplay outfit for your opponent.

The game is played using "Four Tiles (Yontui)", a simplified version of mahjong created specifically for this title. There’s no need to memorize complex hands or calculate scores. Even players with no prior experience in mahjong can enjoy the game through its easy-to-understand, intuitive mechanics.

What is Four Tiles?

Four Tiles is a two-player-only, original mahjong variant. Your goal is to form four "tiles" (sets) before your opponent does, in order to score points.
A "tile" refers to a set of three matching tiles — either three sequential numbers or three identical numbers or symbols.
The game retains the strategic depth of traditional mahjong while streamlining the rules for accessible gameplay.

Unlock Cosplay Costumes

By defeating each girl, you’ll unlock a unique cosplay costume for her.
Each character has her own themed outfits, which can be viewed anytime in the gallery after unlocking.
Collect them all to complete your cosplay gallery!

Her Secret

Regardless of the match outcome, completing a match reveals a piece of each girl's secret story.
Uncover the hidden side of each character as you progress through your matches.

Platforms
Release date
Developer
Yugo Furihata
Publisher
Pgames
Age rating
Not rated

System requirements for PC

Minimum:
  • Requires a 64-bit processor and operating system
  • OS: Windows 10/11
  • Processor: Intel Core i3
  • Memory: 4 GB RAM
  • Graphics: Intel HD Graphics 4000
  • DirectX: Version 11
  • Storage: 1 GB available space
Recommended:
  • Requires a 64-bit processor and operating system
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Last Modified: Jun 2, 2025

Where to buy

Steam