is a real time strategy game designed back in like 1997 by bungie studios, the same makers of the hit games Marathon
, and Halo 2
To my knowledge:
First game to have online play.
First game to support color wheel for choosing thousands of colors for your player/team.
First RTS to change camera angles on the fly.
First game to release map making packages and make some very awesome maps like ADT, WWII, and such.