Combine The Legend of Zelda's dungeon system and tridimensionality with Minecraft's creativity and capability of doing anything you want, there you have 8BitMMO. It has awesome replayability and a good objective: kill Lawyer Cats and Hipsters to gain gold and build something. And his developer is one of the best ones I've ever had the posibility to hear about. He's really involucrated to the project and answers nearly every question you ask him. The only flaw is it's programmed in Java, which makes it unplayable from Google Chrome, which is really suck. But I personally reccomend playing for free on Steam. 10/10, Would donate to the developer if I could
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 "8BitMMO (Construction Sandbox)"){kind=icon}