It will sound silly, but it's called Roblox. It's basically a building game where you can make quite literally anything you like, within the context of the rules, as it's mostly targeted at 12 or younger children. It's also -blam!-ing expensive if you want more than what they give you for joining. the "best" upgrade package is something like 300 dollars. But what had pleasantly surprised me was a game I liked being updated and having it's old version put back up to play. Which is awesome, in my opinion.