So this is a pretty tricky achievement. You have to kill all the Buffalo in the game (Don't worry they don't respawn). Now all the Buffalo are located in the Great Plains which are West of Blackwater so you can't get this achievement 'till around Act III of the game. There aere two ways to get the achievement. The first way is to go up to the herd of Buffalo and simply slaughter them with a regular gun. If you don't kill them all at first you can return to the Great Plains in a few hours and kill of stragglers until you get this achievement.

The Other way to get this achievement is to reach Master Hunter rank 5 in the challenges and you will unlock the Buffalo rifile which kills Buffalo in one shot. Once you get this it will be immensly easier to get this achievement and will save time. Either way BAM! 5 gamerscore for you.

Note: This is my final text only Achievement Destroyer guide. It will be a while 'till you see me again as I must get a new game and figure out the capture device for video podcast's so stay tuned for more, even better guides.

Written by Matthew Byrd:Gamertag: ColonelByrd95