This is actually the DLC Bundle from the current Humble Bundle, so I think this includes all of the DLCs apart from G&K and BNW, but since this doesn't have a Steam entry, this is the only way to give it away. The description from Humble:

Contains the following DLC:

Scrambled Nations Map Pack
Scrambled Continents
Civilization and Scenario Pack – Polynesia
Civilization and Scenario Pack – Denmark
Civilization and Scenario Pack - Korea
Wonders of the Ancient World Scenario Pack
Cradle of Civilization: Mediterranean
Cradle of Civilization: Asia
Cradle of Civilization: Americas
Cradle of Civilization: Mesopotamia
Civilization and Scenario Pack: Mongols, Genghis Khan
Explorer’s Map Pack
Double Civilization and Scenario Pack – Spain and Inca
Civilization Pack: Babylon Nebuchadnezzar II

If the winner's only missing a couple of these I'll request a new one, but as long as you're missing more than a few these you can enter.