Who are the Nomads
The Nomads are a fifth race for Supreme Commander. Unlike the other factions in FA, they do not have access to gating technology and thus move around in huge spaceships. On the battlefield they favour high rate of fire common weapons, such as rockets, missiles, unguided munitions over armour, health and other fancy weapons such as beams.
How do I play the Nomads
They are at the moment in open beta on FAF. Just host a nomads game.