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  1. Steam2.0 · 560 reviews
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Trailers & screenshots

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About Mahjong House: Challenge All Achievements

Mahjong House: Challenge All Achievements is a single-player Japanese Mahjong game that lets you play without an internet connection. You can choose 2-player showdowns, 3-player matches or 4-player games.

Tiles and rules

The game uses a standard 136-tile deck: numbered Man, Pin and Sou tiles, along with the East, South, West and North winds and the Red, Green and White Dragons. It follows classic Japanese Mahjong rules, including the requirement to have at least 1 han to declare a win. More than 50 yaku are included, such as Riichi, Pinfu and Chinisu. Riichi requires a closed hand with no melds; Pinfu is a sequence-based hand with a pair and no honor tiles; Chinisu uses tiles from a single suit.

Scoring and skills

An automatic scoring system calculates points from han and fu. The game also includes three cheating skills.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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