Rivals Mode, also often known as simply Story Mode, is a game mode in Killer Instinct (2013) that was introduced in Season 2. It follows the story arc of each of Season 2's characters (minus bonus character Omen) throughout the heroes' battles against Ultratech and the introduction of Gargos into the plot. It is played in a similar fashion to the Arcade Mode present in Season 1, but has a much bigger emphasis on story and features narrated cutscenes and captioned loading screens to explain the plot. It was officially launched on June 17th, 2015.