Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Good fun game to play as with all CoD games. Campaign is fun especially with 2P split screen which you don't get in many games. Customisation isn't monetised through micro transactions and gives you the sense of progression, which is great! You will enjoy it too.