IGN gave good reviews on the game giving it a 9.7 \/ 10 . They said , `` What is most impressive about this sandbox is how fun it is to simply hop on a horse and take off across the prairie . '' IGN heaped praise on the game , giving it a 9.7 \/ 10 and saying `` what is most impressive about this sandbox is how fun it is to simply hop on a horse and take off across the prairie . ''