EVE Online is very much a sandbox like that, but quite different from everything else in theme and _definitely_ in mechanics. However it is the very definition of a Bartle's Killer game.
I think there's a deeper link between the kind of players who play hardcore MMOs and the mechanics of the game itself beyond the lack of games in this genre. The allure of real loss/real displays of skill draws naturally competitive people. Sure, you can pubstomp in TF2 but at the end of the match, what changed? Maybe someone has a new hat. In EVE you can blow up someone's structure that took them hours of space work or real money. There's no real "risk&reward" when the risk is basically nothing, no matter how great the reward is. What kind of person is drawn to this kind of gameplay? Sociop^H^H^H^H^H^H Competitive people.
I think there's a deeper link between the kind of players who play hardcore MMOs and the mechanics of the game itself beyond the lack of games in this genre. The allure of real loss/real displays of skill draws naturally competitive people. Sure, you can pubstomp in TF2 but at the end of the match, what changed? Maybe someone has a new hat. In EVE you can blow up someone's structure that took them hours of space work or real money. There's no real "risk&reward" when the risk is basically nothing, no matter how great the reward is. What kind of person is drawn to this kind of gameplay? Sociop^H^H^H^H^H^H Competitive people.