| Kabuki Warriors | Xbox | Fighting | 12/31/2001 |
| Kakuto Chojin | Xbox | Fighting | 11/13/2002 |
| Kameo: Elements of Power | Xbox | Action/Adventure | Cancelled |
| Kao the Kangaroo - Round 2 | Xbox | Action/Adventure | To Be Announced |
| Karaoke Revolution | Xbox | Music/Dance | 11/9/2004 |
| Karaoke Revolution Party | Xbox | Music/Dance | 11/8/2005 |
| Kelly Slater's Pro Surfer | Xbox | Extreme Sports | 9/17/2002 |
| kill.switch | Xbox | Action/Shooter | 10/28/2003 |
| Kinect | Xbox | Other | To Be Announced |
| Kinect Sports | Xbox | Sports | 11/4/2011 |
| King Arthur | Xbox | Action/Adventure | 11/16/2004 |
| King Of Fighters 02/03 | Xbox | Fighting | 8/30/2005 |
| King of Fighters: Maximum Impact - Maniax | Xbox | Fighting | 6/28/2005 |
| Kingdom Under Fire: Heroes | Xbox | Action/Strategy | 9/13/2005 |
| Kingdom Under Fire: The Crusaders | Xbox | Action/Strategy | 10/12/2004 |
| Knight's Apprentice: Memorick's Adventures | Xbox | Action/Adventure | 6/10/2004 |
| Knights of the Temple | Xbox | Action/Adventure | To Be Announced |
| Knights of the Temple 2 | Xbox | Action/Adventure | 11/1/2006 |
| Knockout Kings 2002 | Xbox | Sports | 3/30/2002 |
| Konami All-In Poker | Xbox | Card/Casino | 9/30/2006 |
| Kung Fu Chaos | Xbox | Fighting | 1/25/2003 |