This isn’t the first time Runic Games’ Torchlight has been on sale for $5, and yet, some of you still haven’t bought the point-and-click-to-kill-things-style RPG. Considering the game normally goes for $20, which is more than reasonable to begin with, it would be unwise to skip out again.
Do the right thing, and add Torchlight to your list of Steam purchases. Besides, your account is probably 90% full with uninstalled games anyway — what’s the harm of having one more? It’s like a giant, virtual wall of trophies honoring your frugalness.