Complex sentence: Each pilot had a different username, and upon creation you got to choose between the four houses, or teams which were known as House Colos, Hibernia Freehold, House Tokugawa and House Red Star.
Split into simpler sentences: Each pilot had a different handle, and could belong to one of four houses, or teams. These houses were known as House Colos, Hibernia Freehold, House Tokugawa and House Red Star.