Tiir was located on the North Pole, hidden from most of Kharak's population and the city of Naabal. The Naabal were the first to invent chemical explosives, which they did in secret during the devastating Heresy Wars after being forced to into hiding by the racist Kiith Siidim. After almost 300 years the Naabal re-emerged with their chemical weapons and brought an end to the war that could've erased Kharakian life if it had gone on a few years longer. Soon after it was made the capital city of Kharak when the Time of Reason began after a series of Naabali victories that resulted in total victory for their forces. Tiir became the home of the Great Daiamid.
Soon Tiir became the centre of Kharakian life. Here the Great Daiamid made decisions concerning whole globe, created laws, and settled disputes.
In 1110 KDS, the city was sieged by a massive Gaalsien force, but it was repelled.
One of most notable events in Tiir history took place in 1112 KDS when the power plant from Khar-Toba was transported to the city leading to development of new technologies.
- Tiir was first seen in Homeworld, however, although the city was mentioned in the Historical and Technical Briefing, it wasn't confirmed the city shown in the cutscenes was actually Tiir until Homeworld: Deserts of Kharak did it.