30 units total, and 6 extra Megalith eggs which are technically seperate units, but I'm not counting them. Tech 1 (5 units): Light Torpedo Bomber, Light Artillery, Light Air Staging Facility, Pressure Mine, Field Engineer. Tech 2 (5 units): Mass Storage, Energy Storage, Proximity Mine, Heavy Wall Section, Field Engineer. Tech 3 (17 units): Cloakable Mass Extractor, Cloakable Mass Fabricator, Cloakable Power Generator, Cloakable Stealth Field Generator, Heavy Point Defense, Anti-Armor Point Defense, Armored Wall Section, Armored Wall Section (second layer), Armored Gate Section, Mobile Multiple Rocket Launcher, Mobile Missile Launcher, Mobile Strategic Missile Defense, Mobile Cloakable Stealth Field Generator, Heavy Air Transport, Heavy Torpedo Bomber, Field Engineer. Experimental (3 units): Shield Generator, Rapid-Fire Artillery, Omni Disrupting Facility.