1000 deaths in Facility

U all know that facility has probably the largest influx of soldiers. They just never stop. And I'm sure a lot of u have positioned yourself on the final staircase just to see how long u can hold em off and how many u can kill. One of my goals was on 00 agent without any cheats, to kill 1000 people. And after much strategizing and about 200 failed attempts I finally did it. It was a 90 minute long game but in the end I had 1060 kills before I was finally taken down Anyone else ever do it or try to do it