If you thought all the blood had been sucked out of the endless runner genre, you might want to take a look at Corridor Z, a free-to-play game about running down hallways to escape zombies. From Touch Arcade’s 4 out of 5 star review:
The one thing I give developer Mass Creation huge props for with Corridor Z is that it attempts to insert a backstory and context into the simple premise of running endlessly. Sure, Temple Run had the “plot” of you running from cave monsters after stealing a rare jewel, but Corridor Z actually boots up with a cutscene explaining the mysterious viral outbreak that has taken place in the local high school, the game’s setting. Collectible journal entries are scattered throughout the game as well which bring about the story of a character named Jill, though each entry’s attempt at humor will either float your boat or not. I felt they tried too hard at times.
Via Touch Arcade