The games in the series are connected through the characters, events, and themes that are introduced in each installment. The story arc begins with Call of Duty 4: Modern Warfare, continues with Modern Warfare 2 and concludes with Modern Warfare 3.

Its single-player is flat-out terrible, its Zombies mode is uninspired, and its multiplayer has so many serious problems that it's hard to enjoy it. The game also has technical issues, and microtransactions that border on being pay-to-win because of how hard it is to spot paid skins in its maps.

Gold bars tend to be less costly to produce and, therefore, generally sell for closer to gold's current spot price. By comparison, gold coins are costlier to mint due to their intricate designs. They're also considered collectible, which can lead to higher premiums for coins that are seen as especially valuable.

Most experts recommend limiting your gold investment to 10% or less of your overall portfolio. The range between 1% and 10%, however, will often vary based on your age and overall investor profile.