The Tech Lab is required to produce high-tech units such as Stealth tanks, the Specter Artillery, Avatar Warmechs, mantis, commandos, Purifiers, Vertigo Bombers, and Beam Cannons (though this was later transferred down to the Operation Centers in Kane's Wrath). It also allows the building of the advanced structures such as the Obelisk of lights, Tiberium chemical plants, and the Temple of Nod with its nuclear weaponry guidance systems. Building the Tech Lab in conjunction with the secret shrine unlocks the Commando from the Hand of Nod.