Gamer has been removed
The Hunting Rifle isn't implemented as much as the Shotgun, and it's more powerful. Make sure to take the Hunting Rifle and all the ammo you can whenever you see it. Don't worry about conserving your ammo, and even though this gun is very effective on the big guys, take out the regular Taken with it and you'll get the achievement during your first play through. The best place to grind out these kills is during the stage battle at Anderson Farm during the end of Episode 4.