Thought I'd share a cool trick. GamersGate currently has 75% off Civilization 5 DLC for Mac. However, not many people know (not even GamersGate by the looks of it) that DLC codes bought for Mac also give you the DLC for the PC version too. Just activate the code you get on Steam and voila, you get the right DLC for your system. I have confirmed this with myself and another person.
So basically, if you're into Civilization 5, you can get all the DLC for cheap! Except for Polynesia, not sure why that's not on sale. Not sure how long this deal is going for, so grab it while it lasts. Gods & Kings isn't on sale at the moment either.
Civilization and Scenario Pack: Korea - $1.50 ($6 normally)
Civilization and Scenario Pack: Denmark - $1.24 ($5 normally)
Civilization and Scenario Pack: Spain & Inca - $1.87 ($7.50 normally)
Civilization Pack: Babylon - $1.24 ($5 normally)
Wonders of the Ancient World - $1.50 ($6 normally)
Cradle of Civilization Bundle - $2.50 ($10 normally)
Explorers Map Pack - $1.24 ($5 normally)
Total - $11.09 ($45.50 normally)
Happy Conquering
Might want to note that this excludes Gods and Kings in the title - I had my hopes up :(