Alphatron is a vicious Space faction that is ruled by greed. It is made up of several factions and the only unifying characteristic is the Alphatron 'vest' part of the uniform.
Rainbowtron is a mysterious Space faction that seemingly delights in colorful vehicles. The only requirement for a Rainbowtron MOC is that black, all grays, all browns and tans are off limits. White is fine. BUILD!