M&Ms have always had stellar marketing, but the company used simple gamification to great effect when it launched its 2013 pretzel game. It was basic and relatively easy, so appealed to a wide variety of people with no barrier for entry, requiring only a little bit of eye-spy knowledge. All you had to do was spot a pretzel in the middle of an image full of M&Ms. It offered no reward bar the knowledge you managed it, yet brought 25,000 new likes to the brands page. Proof that gamification, even in its most basic form, appeals to peoples competitive and challenge-based natures.