Imangi Studios' Temple Run 2 has been ridiculously successful in a short period of time. The game was downloaded more than 50 million times in 13 days since it was first released on iOS January 17.

Since then, the game has been made available on Android and Kindle devices. The speed at which it hit the 50 million download mark makes it the fastest-growing mobile game ever, surpassing Angry Birds Space's previous record of 35 days.