Valve's Steam download unit can be full of surprises. Today the service launched a special sale of a number of THQ-published games, one per day until Friday (and that sale will last the entire weekend). Today THQ has put the Titan Quest line-up of games on sale for 50 percent off.

That means you can get the fantasy action-RPG (released in June 2007) from the now defunct developer Iron Lore for just $9.99 or its expansion pack The Immortal Throne for another $9.99. Or if you don't have either game can get both in a bundle for just . . . $9.99. This deal last until around 12 noon ET on Steam and then they will switch over to another THQ sales deal.