Wario Land: Super Mario Land 3 starts at the end of Super Mario Land 2: 6 Golden Coins. Wario Land features a theme of greed remarkably different from almost all of Nintendo's other franchises: It is the first game Nintendo has made where the main character's cause is decidedly selfish. There are no princesses to save, no world in peril. There is only one goal: for Wario to earn as much money as possible, in an effort to buy his own massive castle and make Mario jealous. The larger the cash total Wario has collected at the end of the game, the better house (and ending) that Wario will receive.
The Super Mario Land 3 subtitle links the game with the popular Super Mario Land 2. The game also increases its replay value by including a large hidden treasure chest in some levels. The chests (which can only be accessed by finding a special key placed elsewhere in the level) contain special one-of-a-kind treasures, which would each add a considerable amount to Wario's coin total at the end of the game.