A browser game is a computer game that is played over the Internet using a web browser. Browser games can be created and run using standard web technologies or browser plug-ins. Browser games include all video game genres and can be single-player or multiplayer. Browser games are also portable and can be played on multiple different devices or web browsers.
Browser games come in many genres and themes that appeal to both core players and casual players. For example, Zynga's Farmville is a popular Facebook farming browser game that uses the Facebook interface for easy point-and-click interaction with game mechanics that are easy to understand for all players. Games like Farmville are also social, and social hooks are provided to interact with other users on Facebook, as well as report achievements to one's Facebook Wall. Other titles like Evony and Aeria's Caesary and Lords Online are relatively complex and deal with many factors associated with RTS games and may require more involvement and time commitment from players. These kinds of games also include a competitive player-versus-player or pvp element and social network building in the form of leagues, guilds, etc.