The Atlas is the original Titan model produced by Hammond Robotics. It has a balance of mobility and armor, having more mobility than the Ogre, but more armor than the Stryder. This was the first Titan to be revealed. (source)
Haha thanks! <3 Wait till you see what’s considered the lightest frame pattern in the entire game, Stryder. Was such a pain in the butt to actually make the cockpit look compact! xD