The Quest of Jongmaster follows the story of Chi Fou, an apprentice "mahjong warrior", as she is sent on a quest to defeat monsters that have been unleashed on the world. The RPG mode is structured like a traditional medieval top-down RPG, with town and dungeon exploration, NPC interaction, and other familiar elements.
In this mode, players can equip weapons and armor, cast magic, and purchase healing and status-recovering items. Experience points and money are awarded after each battle, and random and boss battles feature standard mahjong games with special tiles that influence the game's result.
The game also features a versus mode, where players can compete in mahjong games against the opponents of the RPG mode. These opponents appear as monsters at first, but are revealed to be young women who strip down to underwear when losing a round, resulting in defeat.