At Gamescom 2015 , a third season was announced , which released in March 2016 alongside the PC version ; Rash from the '' Battletoads '' series was also announced as a playable character for Season Three , and was made available to existing '' Killer Instinct '' players or owners of the '' Rare Replay '' compilation for a brief test period prior to the season 's launch . The second guest character is the Arbiter from '' Halo '' , announced at the 2016 Halo Regional World Championships . The final guest character , '' Gears of War '' 's General RAAM , was announced during Microsoft 's E3 2016 press briefing and released following the presentation 's conclusion . Mick Gordon , the composer for the first two seasons , did not return for Season Three , with Atlas Plug and Celldweller assuming the role in his stead
E3 2016
E3 2016
Killer Instinct (2013 video game)