A Titan, sometimes colloquially called a god-engine or god-machine, is any one of several classes of massive, crewed, robotic combat walkers fielded by the Titan Legions of the Adeptus Mechanicus‘ Collegia Titanica or by the forces of ChaosDark Mechanicum. Originally, this term referred to many types of large combat walkers used by all of the different factions of the Milky Way Galaxy. Titans are always considered the largest and most powerful types of war engines available to the different factions of the galaxy.