Headshot Honcho
From Halopedia, the Halo wiki
Headshot Honcho is a Halo 3 achievement. It is awarded for killing 10 enemies with sniper headshots in a ranked free for all playlist, or in campaign mode.
It is represented by a black crosshairs with a sad face in the middle, indicating the head.
Easy Ways to Earn the Headshot Honcho
One easy way is also on The Ark, but at the beginning with the sniper rifle as the enemies do not no you are there unless you distract them. Just snipe all the enemies in the head. Also, don't be afraid to waste a shot on a Grunt with the Sniper Rifle to get this achievement, Grunts do count for the Achievement on as low as a difficulty like Normal.
Another way is to play Tsavo Highway up to the second outside area (the two shades near the pump station) there are many Jackal Snipers in this area. Kill one and pick off all of the grunts. There are enough grunts and Jackals here to earn the achievement.
Another easy way to earn this achievement is in the level Sierra 117, in the last part of the level. You just have to take the sniper rifle and snipe everybody on the head.
This achievement doesn't have to be done without dying, so if you don't have enough ammo, you can commit suicide and make the missing headshots. This achievement can be done on easy.
If you are getting it on multiplayer, expect to get negative comments on your snipe streak.
Another way you could get this Achievement is to get a Battle Rifle or Covenant Carbine and shoot a heap of Grunts. Unfortunately, there is a glitch that may prevent the achievement from being unlocked on your first few attempts, or when using the Battle Rifle or Covenant Carbine.
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