Four-Tile Mahjong is two-player mahjong played with a hand of four tiles. We shrank the usual 13-tile game down to 4 tiles plus 1. Complete one set and one pair to win. There are no calls. Scoring patterns (yaku) and points work just like regular Japanese mahjong, including riichi, dora and yakuman. Each player starts with 15,000 points, and winning a hand only takes points from your opponent. The match ends when either player drops below zero or the East round is over. Matches are played online. Choose the casual table, or the advanced table where your rating changes. If no opponent is found, the computer plays against you. Scoring patterns you win with at the advanced table are kept as achievements, and winning with them unlocks titles that your opponents can see. You can share a finished match as a link to its record. An internet connection is required to play. The game is in Japanese.