Moose

Mad Max.
Sweet.

Sneaky, it seems their daily deals are items not previously on sale. At least, in some cases. 
Holding out for Red Alert 3.

It's an indie game so it'll run on your Mac. "

 
Sam and Max is an obvious choice too. Well written, compact, and with some of the best music and voice acting you'll hear in a game. Both seasons work standalone, or you could buy episode by episode. I think the fourth has been released for free to promote it, it's definitely worth checking out, if only for the "War" song. Seriously, youtube it. 
 
Mac gamers still have a raw deal, but between Altitude and Torchlight, I can keep busy when I can't get to my PC.

You should buy Bioshock.
 
A man chooses, a slave obeys.

Brad Shoemaker and the Endurance Runners
EDIT: Matt Rorie and the Cushy PR Jobs

Damn, 11 pages.
 
This is funnier than it should be.

6'5"
 
I duck when I go through doorways.

Get Scrambles, it's free!
 
And incredibly awesome.