American, Chinese, Hong Kong, and British Mahjong are supported. Can't play your way? Send us an email!
Mahjong 4 Friends provides instructions in little yellow bubbles while in the game. If you want to learn more about rules and strategies, a comprehensive tutorial is linked to from the app. Summaries of rules are provided below:

Chinese/British/Hong Kong Rules
- 4 pongs/kongs and a pair are mahjong
- Sequences can be used to replace a pong/kong
- An optional charleston is provided
- Mahjong and sequence limitations can be overridden (to help you play by your rules!)