The Quantum tech tree provides several extremely powerful weapons later in it's research, but early on it's upgrades are much more specific not quite as useful as the other two branches. This branch provides several offensive upgrades, such as Phase Tanks, Mind and Machine Control Magnets, and explosive plasma for all units that use it (Grunts, Lost Ones, Phase Tanks, and the Walkers. It also privides Monoliths and Lost Ones with phasing and walkers with other defensive upgrades. At Suite 2, it grants access to Kamal Re'x.