Mine was at the Hu Lao gate playing as Lu Bu got 1394 kills but my best kill spree has to be also at Hu Lao gate when I played as Gan Ning: Dong Zhuo forces (free mode of course) and got 2006 kills woah!!!
Please visit this site http://www.theworldhand.com so as to keep it running.
Also try playing this game http://www.darkthrone.com, it might not be the best in the world but it can sure rock.