The Construction Yard is the heart of your base, the key
structure that allows you to build all other buildings from
walls to Weather Control Devices. Best to make it the
literal heart of your base as well, keeping it out of harm's
way by nestling it in the center of your base's layout,
protecting it with a variety of ground and anti-air defense.
And don't forget walls -- many a Construction Yard has been
sold at the hands of a sneaky engineer because a player
forgot to wall it in.
Power plants fuel your base. Without power, your radar
doesn't operate and advanced structures such as Gap
Generators suffer as well. Placement is key when it comes to
Power Plants. Since a well-planned enemy strike can cripple
your power grid, it's best to spread your Power Plants out;
clustering them together makes them vulnerable to a
Ore Refineries (and Chrono Miners) are the lifeblood of your base's
economy. Crucial to keeping your flow of credits smooth and
uninterrupted is making sure you have at least three or four Chrono
Miners per Refinery -- their chrono-shifting ability means they
don't cause traffic jams. Spread your Refineries out and protect
them well, especially from aerial assault
Barracks produce all infantry units, from GIs to Chrono
Legionnaires. Since it's well armored, the Barracks can take
quite a beating and it usually isn't the first structure
targeted by an enemy.
The War Factory is the production center for vehicles,
crucial for heavy-duty machinery such as Grizzlies, Mirage
Tanks and Prism Tanks. Keep it well protected, as it's a
vital branch on your tech tree.