“Overlord: Complete Pack” with Overlord, Overlord II, and Overlord: Raising Hell is $8.75. I note that Overlord itself is just $1.50. I have heard mixed things about Overlord, notably that you spend too much time saving villages considering that you are the villain, and the Raising Hell levels sound like a lot of that. On the other hand, there are only so many good “be the bad guy” games out there, and there are good things too. If you want a review of a game from 2007, I might say some things after I play.
$1.50 for an old game, and it downloads and installs itself while I sleep? I should be looking through these digital distribution channels for classic games I never played. My list of books to read and movies to see also has a “games to play” section.
I did not enjoy Left 4 Dead much, but if you want the sequel, your pre-order time is almost up. Steam has the same deal there that Borderlands did: 10% off plus buy-3-get-1 free, which is just a brilliant offer for games with 4-player coop. Various places will also give you stuff for pre-ordering, like a Team Fortress 2 hat or a L4D2 bat.