I've always wondered how these software version numbers are given. - Have you? I hope with some help we can figure it out, and hopefully someone with knowledge can help us in the process! There's even an article about Software Versioning on Wikipedia: http://en.wikipedia.org/wiki/Software_versioning Based on article the Civ5 seems to go under: So far, with the Civ5 we have had: The initial version, which I assume was 1.0.0.00 or just 184.108.40.206 220.127.116.11 18.104.22.168 22.214.171.124 Where do these numbers come from in case of Civ5? Are the 17, 20 and 62 the numbers of issues fixed or something?