Return of the Forerunners delves into the technical aspects of character development, encompassing everything from their menacing silhouettes to their finalized 3D designs, animations, and visual effects systems.

The unique proposition to games was that in Halo lore this was the first time this enigmatic foe was being featured in the Halo games. Only the environmental relics of the race had been seen before but now fans and gamers would get an opportunity to fight them.