- Kaiju Panic (Xbox One)
- Kalimba (Xbox One)
- Kameo: Elements of Power (Xbox 360)
- Kami Hd (Xbox One)
- Kamiko (Xbox One)
- Kao The Kangaroo (Xbox Series X|S)
- Katamari Damacy REROLL (Xbox One)
- Katana Zero (Xbox One)
- Keep Talking and Nobody Explodes (Xbox One)
- Keeper (Xbox Series X|S)
- Kemco RPG Collection Vol. 1 (Xbox Series X|S)
- Ken Follett's The Pillars Of The Earth (Xbox One)
- Kena: Bridge of Spirits (Xbox Series X|S)
- Kentucky Route Zero (Xbox One)
- Keplerth (Xbox for PC)
- Kerbal Space Program (Xbox One)
- Kick & Fennick (Xbox One)
- KickBeat Special Edition (Xbox One)
- Kid Tripp (Xbox One)
- Kill It With Fire (Xbox Series X|S)
- Kill It With Fire! 2 (Xbox Series X|S)
- Killer Instinct (Xbox One)
- Killer Instinct 2 Classic (Xbox One)
- Killer Instinct Classic (Xbox One)
- Killer Instinct: Anniversary Edition (Xbox Series X|S)
- Killer Is Dead (Xbox 360)
- Killer Klowns From Outer Space: The Game (Xbox Series X|S)
- Killer Queen Black (Xbox One)
- Killing Floor 2 (Xbox One)
- Killing Floor 3 (Xbox Series X|S)
- Kiln (Xbox Series X|S)
- Kine (Xbox One)
- Kinect Adventures (Xbox 360)
- Kinect Disneyland Adventures (Xbox 360)
- Kinect Fun Labs: Air Band (Xbox 360)
- Kinect Fun Labs: Kinect Sparkler (Xbox 360)
- Kinect Fun Labs: Musical Feet (Xbox 360)
- Kinect Fun Labs: Mutation Station (Xbox 360)
- Kinect Joy Ride (Xbox 360)
- Kinect Nat Geo TV: Season 1 - America The Wild (Xbox 360)
- Kinect Nat Geo TV: Season 2 - Dangerous Encounters (Xbox 360)
- Kinect Party (Xbox 360)
- Kinect Rush: A Disney Pixar Adventure (Xbox 360)
- Kinect Sesame Street TV (Xbox 360)
- Kinect Sports (Xbox 360)
- Kinect Sports Rivals (Xbox One)
- Kinect Sports Rivals: Preseason (Xbox One)
- Kinect Sports: Season Two (Xbox 360)
- Kinect Sports: Ultimate Collection (Xbox 360)
- Kinect Star Wars (Xbox 360)
- Kinectimals (Xbox 360)
- Kinectimals: Now with Bears! (Xbox 360)
- King Oddball (Xbox One)
- King of Meat (Xbox Series X|S)
- King of Wushu (Xbox One)
- King's Quest (Xbox 360)
- King's Quest (Xbox One)
- King's Quest: The Complete Collection (Xbox One)
- Kingdom (Xbox One)
- Kingdom Come Deliverance 2 (Xbox Series X|S)
- Kingdom Come: Deliverance (Xbox One)
- Kingdom Hearts (Xbox One)
- KINGDOM HEARTS - HD 1.52.5 ReMIX (Xbox One)
- KINGDOM HEARTS HD 2.8 Final Chapter Prologue (Xbox One)
- Kingdom Hearts III (Xbox One)
- Kingdom Hearts Melody of Memory (Xbox One)
- Kingdom of Arcadia (Xbox Series X|S)
- Kingdom Two Crowns (Xbox One)
- Kingdom: New Lands (Xbox One)
- Kingdoms of Amalur: Re-Reckoning (Xbox One)
- Kingmakers (Xbox Series X|S)
- Kitaria Fables (Xbox Series X|S)
- Knee Deep (Xbox One)
- Knight Squad (Xbox One)
- Knightin' (Xbox One)
- Knights and Bikes (Xbox One)
- Knockout City (Xbox Series X|S)
- Kona (Xbox One)
- Kona 2: Brume (Xbox Series X|S)
- Korgan (Xbox One)
- Kraken Academy!! (Xbox One)
- Krinkle Krusher (Xbox One)
- Kulebra and the Souls of Limbo (Xbox Series X|S)
- Kung Fu Chaos (Xbox)
- Kung Fu High Impact (Xbox 360)
- Kung Fu Panda 2 (Xbox 360)
- Kung Fu Panda: Showdown of Legendary Legends (Xbox 360)
- Kung Fu Panda: Showdown of Legendary Legends (Xbox One)
- Kung-Fu for Kinect (Xbox One)
- Kunitsu-Gami: Path of the Goddess (Xbox Series X|S)
- Kursk (Xbox One)
- Kyub (Xbox One)
- Kyurinaga's Revenge (Xbox One)