I beat the PlayStation 2 version of this game on December 29th, 2002. It isn't my usual type of game, but I really liked it for some reason.
I beat the PlayStation 3 (Killzone HD) version of this game on November 6th, 2013.
3. Killzone 2
I beat the PlayStation 3 version of this game at 9:10pm Central Time on March 4th, 2009. I first completed it on Veteran difficulty. It took me exactly 8 hours, 20 minutes, and 14 seconds to do so. I beat the game on Easy on November 10th, 2013 in preparation for Killzone: Shadow Fall's release on November 15th, 2013 (the launch of the PlayStation 4).
4. Killzone 3
I beat the PlayStation 3 version of this game on November 13th, 2013.
5. Killzone: Shadow Fall
I beat the PlayStation 4 version of this game on November 17th, 2013. It is the first PlayStation 4 game I ever beat.
6. Kinect Adventures!
I beat the Xbox 360 version of this game on February 21st, 2011. It is the first Kinect game I ever beat.