Obsession, 8-bit, no rules, and a great modding community make this one great.and with 100's pop-culture refrences.
of course this survival game runs closer to sandbox as for there is no real goal and you could survive as long as possible by digging a hole and covering up that hole.
Minecraft also has a creative sandbox mode that allows people to make whatever they want with unlimietd resources if you want to make a life size version of the star trek enterprise well, some ones been there done that.