HomeLAN - Why was Irrational picked as the developer of the new SWAT game? Rob Irving - VUG already had a good relationship with Irrational due to Tribes Vengeance. Irrational had a history of making quality projects, and they also had experience developing with the Unreal engine. Because the skill set of the Irrational team matched the direction that we wanted to take with the franchise, they were the obvious choice.