Tres is the third universe.
During Eden-Alpha, Tres was created. On Tres, there were 2 races: humans, and Administrators. There was also the Owner, who controlled this universe. However, one Administrator abused his power, and was kicked out of the Administrator group; Mitch. Mitch was the first Exploiter, comparable to the first fallen angel Lucifer in christian lore.
As more Administrators came into existence, more of them abused their power, and became Exploiters along with Mitch, who was now known as Mitch the Glitch. A war between Administrators and Exploiters soon followed, and ended at Z-Omega, when Dark Mind ripped all 3 universes apart, and Tres was destroyed, along with all its inhabitants.