Arcade Shooting Gallery Achievement
This is by far the hardest achievement in the game followed by King of Reflexes. The easiest way to get this achievement is to follow this method:
On the first arcade gallery shoot the first 14 Big Game animals to shoot in the first section. The first 4 animals at the beginning you can't shoot but they count. After this 14 there comes the second section with only Birds. Just do nothing! Let the time always run out again and again until the Game is over! (Ten times) After that you will get the trophy because you have shot 14 from 18 Big games and so 75%.
There should be three animals at once, then another 3, then 8 at the end which is the hardest part. Make sure you have aim assist turned on to make this a lot easier. I got it on my first try with aim assist on while using a normal Xbox 360 controller.