2013 saw the rise and fall of one of the most notoriously famous mobile games known for it difficult leveling, that was developed by the Vietnam-based developer Dong Nguyen.
Flappy Bird, with a legend of its own as a tag line, became famous overnight topping app stores in over 100 countries. It is actually a side scrolling mobile game where the score is counted when the player successfully moves the bird on the screen past a series of oncoming pipes without colliding.
Flappy Bird was highly controversial in the manner that some thought that the success was driven by computer bot while other thought that it was a PR stunt. Unable to take all the criticism, the developer took it down after less than 9 months of its launch with only a tweet as an explanation.