The sole playable character in the free version rotates on a regular basis. Players can purchase 'Combo Breaker Packs' for a single fee, which provides immediate access to all eight characters of a certain season. In its base form, Killer Instinct is a free-to-play demo of the game that includes all available game modes but only one playable character, with the ability to purchase additional fighters individually. The game itself serves as a reboot of the franchise after enduring a 17-year hiatus since its last title, Killer Instinct 2, was released. Each season contains a new set of characters, stages, game modes, and other features. The first season was produced by Double Helix, and the second and third were by Iron Galaxy Studios, following the acquisition of Double Helix by Amazon.

While it was first released in 2013, Killer Instinct has been divided into three separate phases of development called 'seasons'. The game is published by Microsoft Studios and was originally released exclusively as a launch title for the Xbox One, but since then a PC port for Windows 10 has been released. Killer Instinct (also known as Killer Instinct (Xbox One) or Killer Instinct 3) is a fighting game developed by Double Helix Games under the supervision of Ken Lobb and with input from Rare.

For the 1994 original arcade game, see Killer Instinct (1994 video game) Steam: Digital download This article is about the 2013 remake. Xbox One: Digital download, CD (Combo Breaker Pack & Definitive Edition only)

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