FOURTH tier of barracks & vaults? I give up
Anyways, new version is up. Cydonia is finally fixed, map tweaked a bit and added requirement to wear space-capable armor (if you don't have one, the Conqueror will provide you with a space suit).
Another change that might surprise is the need of Chemicals for Pigeon and Skyranger to fly.
Other than that, bunch of various stuff and even bigger bunch of fixes (thanks for all bugreports). As always, check the log in the first post for the full change list.