The Steam Heralds are a conglomerate of races that separated from the races of RuneScape early on and developed a new civilization based on science and scientific discoveries to further their technology. Living on a large, resource-rich continent far away from the rest of RuneScape, they shunned the usage of runes and magic, to develop a society which uses steam-driven vehicles and weapons. Over time, they grew to hate magic, and in the year 412 they launched a genocidal campaign against the peoples of RuneScape.
The Steam Heralds were a secret order that opposed the reliance on magic, and foresaw that the civilizations of the future would suffer. To escape this fate, they rounded up as many people as possible and set sail to the far west to establish a new society. This occured in the year 121, in the third age - the God Wars.