Orcs must Die 2 for a couple of bucks isn't a bad way to waste money.
Also, Mark of the Ninja was a steal at 8 bucks (excellent game).
I managed to pick up Dishonored at GMG for 22 bucks after the 25% discount code as well, but this sale has left me a bit meh. Apparently the christmas one isn't far off either (I suspect they delayed it to coincide with PS2 + a number of other game expansions, which seems kinda silly to me if people have already spent on other titles).
Asmodai aka Saviourself aka Stabbitha aka Azshadoria... or Azsh... Azshaz?