Turok

In order to acquire this achievement you will need to kill the enemy player who picks up your flag five times, to do this you will need to be playing any "Capture the Flag" gametype. A good tactic to use is to find a good weapon and hide somewhere near your flag so that when an enemy player picks it up you can kill them without being spotted. Don't worry if more than one enemy comes because whoever is carrying the flag will run slower than normal so you will have a little more time to kill them.