Apolyton has posted yet another video from ApolyCon, this time a presentation by Soren Johnson and Dorian Newcomb on how they prototyped Civilization IV.

The first part of the five part series is available for download (http://apolyton.net/forums/showthread.php?postid=4551308#post4551308). This part is 22m16s long and is 50.9 MB in size.

EDIT(8/21): Prototyping Civilization IV (Part 2/5) (http://apolyton.net/forums/showthread.php?threadid=156416) is up.

EDIT(8/19): Part 2 of the Modding Civilization IV & Firaxis Tour Videos are also posted.

Modding Civilization IV (Part 2/5) (http://apolyton.net/forums/showthread.php?postid=4553750#post4553750) | Firaxis Games Video Tour (Part 2/3) (http://apolyton.net/forums/showthread.php?postid=4556157#post4556157)