Unreal Tournament III

The "Head Hunter" award is earned for getting 15 headshots with the Sniper Rifle in a single match.

Suggested Setup
Gametype: Deathmatch
Map: Morbias Arena (Free Map Pack DLC)
Mutators: Weapon Replacement (Rocket Launcher/Enforcer to Sniper Rifle)
Match should be played split screen with a second controller.

Both this and Don’t Taze Me Bro! should both be played in Split Screen mode, so that you can get the kills against a standing target. This makes the headshots in this and Combo Kills with the Shock Rifle much easier to pull off. Make each match to 15 points, then simply play through 10 matches in a row only getting headshots with the rifle or combo kills with the Shock Rifle. After your tenth match the trophy will pop. If you feel like you might have missed doing a kill properly, you can grab the Redeemer that spawn in the middle of the map and use it to kill yourself, taking away a point and giving you another chance at a kill.