In the Java-based Tony Hawk's Pro Skater 4 Street, the extreme-sports PC game goes mobile, complete with 14 skaters to choose from, 5 skills to upgrade, and 6 unique levels, with tons of opportunities for high-flying moves. Grind on railings in an old shipyard, catch some crazy air at Alcatraz, and head to the streets of London to show your stuff. At each location, you can achieve numerous objectives to unlock new skills, skating gear, and secret areas. Who says phone games can't be intense?