it is difficult to draw a line between multipurpose games and gamified apps. Multiplayer mobile games Many mobile games support multiple players, either remotely over a network or locally via Wi-Fi, Bluetooth or similar technology. There are several options for playing multiplayer games on mobile phones: live synchronous tournaments and turn-based asynchronous tournaments. In live tournaments random players from around the world are matched together to compete. This is done using different networks such as Game Center, Google+, and Facebook. In asynchronous tournaments, there are two methods used by game developers centered around the idea that players matches are recorded and then broadcast at a later time to other players in the same tournament. Asynchronous gameplay resolves the issue of needing players to have a continuous live connection. This gameplay is different since players take individual turns in the game, therefore allowing players to continue playing against human opponents. This is done using different networks including Facebook. Some companies use a regular turn-based system where the end results are posted so all the players can see who won the tournament. Other companies take screen recordings of live players and broadcast them to other players at a later point in time to allow players to feel that they are always interacting with another human opponent. Distribution Mobile games can be distributed in one of four ways: Over the Air (OTA): a game binary file is delivered to the mobile device via wireless carrier networks. Sideloaded: a game binary file is loaded onto the phone while connected to a PC, either via USB cable or Bluetooth. Pre-installed: a game binary file is preloaded onto the device by the original equipment manufacturer (OEM). Mobile browser download: a game file is downloaded directly from a mobile website. Until the launch of Apple App Store, in the US, the majority of mobile games were sold by wireless carriers, such as AT&T Mobility, Verizon Wireless, Sprint Corporation and T-Mobile US. In Europe, games were distributed equally between carriers and off-deck, third-party stores. After the launch of Apple App Store, the mobile OS platforms like Apple iOS, Google Android, and Microsoft Windows Phone, the mobile OS developers themselves have launched digital download storefronts that can be run on the devices using the OS or from software used on PCs. These storefronts (like Apple's iOS App Store) act as centralized digital download services from which a variety of