It's been about six months since Runic Games launched its popular Diablo-style RPG, Torchlight. But the game still seems to be building in popularity with gamers as Runic Games today announced that Torchlight has gone Gold and surpassed the half a million sales mark. The milestone is achieved just weeks before the game's Mac version went live on Steam. To celebrate the new milestone and the Mac release, Torchlight is now available for 50% off ($9.95) until Sunday on the Steam Store.

Not sure what Torchlight is? Check out the Ten Ton Hammer Torchlight Review and find out.