Guild Wars 2 was released earlier this month -- it's a very popular sequel to a great (subscription-free) MMO game, and it offers up a lot of interesting innovations in regards to online massively multiplayer RPGs. When the game arrived, it was a PC-only title, but the developers have now announced that they will be supporting the game on Mac as well.
As ArenaNet says, the company is happy to "offer [Macs] as part of our employee laptop subsidy program, and our president Mike O'Brien is rarely seen without his Mac laptop. We're as excited as anyone to play Guild Wars 2 on OS X."
The Mac beta is available right now. Of course, you'll need to purchase the game