- "…Storm the battlefield with Tyth, god of rage. The Firstborn of Izax and Scyva leads us to victory against the profane outlanders. Raise your bloodied fist and cry triumph…"
- ―"The Awe of Tyth," part of a Zakuulan devotional text
Tyth, the Firstborn, was the warrior god and avatar of rage among the six primary Old Gods, the deities worshiped by the people of the planet Zakuul prior to Valkorion's ascension to Immortal Emperor. The first of the four children of Izax and Scyva, Tyth was accompanied on the battlefield by his sister Aivela, and Zakuulans believed that Tyth would lead them to victory against outlanders .
Tyth originated as an experimental Iokathii wardroid, built by an ancient, but highly advanced people. He, along with his five brothers and sisters, were tested on several unsuspecting worlds, leading to over ten trillion casualties. One of the worlds tested, Zakuul, would eventually come to worship the machines as gods, naming Tyth the god of war and rage. Even to the years following the Treaty of Coruscant, Tyth was still worshipped by many on Zakuul.
Later on, when Iokath erupted into civil war, one side used Tyth and his brethren against the opposition, but the mere act of unleashing the war droids resulted in the extinction of all life on the planet. Afterwards, Tyth and the other Old Gods fell into dormancy.
By the time the Eternal Alliance, the Galactic Republic and Sith Empire waged war for control of Iokath, Tyth was the first of the six war droids to reawaken. Tyth's true nature as a superweapon remained unknown to all parties until the individual known as the Outlander confronted Tyth. The God of Rage revealed to the Outlander that a close companion had lured all three factions to Iokath to start a galactic war. Eager to demonstrate his power, Tyth attacked the Eternal Fleet, which retaliated and forced Tyth to retreat.
- Star Wars: The Old Republic
- Star Wars: The Old Republic: Knights of the Fallen Empire (First mentioned)
- Star Wars: The Old Republic: Knights of the Eternal Throne (Mentioned only)
- (Picture only)