[Original writeup](http://quangntenemy.blogspot.com/2014/01/ghost-in-shellcode-2014.html)
Because the logic of the game was implemented in .NET, using .NET Reflector with Reflexil plugin I was able to patch the game to send 1001 kills to the server. So only 10 kills were needed to finish the quest (Actually it was possible to send 10000 kills in 1 go but we did it this way to be "nice" to the server :P)