First off, you need the Rapid Fire Hunter ability. It's in the fourth row, second column. Feel free to upgrade it to level 3 but you shouldn't need to with this guide.
Equip Rapid Fire to any of your four buttons, I just used A and that's the button I'll be stating throughout the guide. Once you have it equipped, head to Star Observatory in Kephalonia (top left of the map). You may know this area if you've seen guides on the Stink Eye achievement.
Once you fast track to that view point, head across the valley North/slightly East. I've included a video of a different achievement below but it is the same location. (maybe you'll get lucky and get both achievements)
There should be tons of goats running around. Hold left Trigger and tap A (or whatever button you chose to equip the ability to). This will ready your ability (your arrows should glow if you aren't using fire). Aim at a goat and tap A again. Should be a one shot, one kill. Do this to 10 goats and the achievement is yours.
- Do not
fire an arrow with RT. Use your designated button
- You can use fire arrows (my bow automatically makes arrows into fire arrows)
- You only have to shoot one arrow at a time
*This is not my video just one I used for a different achievementhttps://www.youtube.com/watch?time_continue=13&v=pU4FUGg...