Subway Surfer is one of the most popular name in smartphone gaming. The concept is that you have to collect coins while jumping over trains and other objects. The layout and design is good. The game lags a bit in Windows Phone. The game graphics is stunning. Features - Game takes you to different locations every month, Completins objectives in time gives rewards and many more. Usefulness - Nothing really helpful. Overall good for time pass but beware highly addictive.