Caveman2Cosmos is a CivFanatics community mod that add new features and content to the Civilization 4 experience, with almost daily updates since November 2010. It is the spiritual successor the The Civilization 4 mod Rise of Mankind and its addon A New Dawn, and combined the work of over 100+ modders to create a mod to "rule them all". It is developed by StrategyOnly Productions with its modding team made up of prominent members of CivFanatics.
This mod is nothing short of mind blowing. One of the most ambitious and well executed mods I've ever played. The team behind it is just as brilliant as the content within it. It takes everything you loved about Civilization IV and expands it, while building upon concepts that made it so great. As a starting tribe(you have to work a bit to even be a civilization), you need to hunt for food and fight off your primal cousins, all the while trying to evolve. This is but a few of the many concepts introduced in this mod. So, can you do it? Can you build a civilization that can truly stand the test of time in what in my opinion is one of the greatest mods of all time? Download and find out.