User Summary A free to play browser game similar to Mafia Wars. Castle Age is integrated in Facebook. It also has its own app for the Google Web Store and iOS market. True to most games that originated for browsers, Castle Age has a timer for 2 in-game stats, energy and stamina, essentially determining how many actions the player can take. Energy primarily is used for completing quests, while stamina, for combat. Players purchase lands, soldiers, equipment and heroes to take down monsters and opposing players and guilds.