Imperia Online is a persistent, browser-based, massively multiplayer, online real-time strategy game developed by the Bulgarian game production company Imperia Online Ltd. It was originally released on August 23, 2005. Set in a Medieval world, Imperia Online is a predominantly militaristic strategy game. Imperia Online has been translated into 30 languages and has over 35 million registered users.
Imperia Online is set in the Medieval times. Each player starts the game as the emperor of an undeveloped Province. The Province can be developed by constructing - and later upgrading – various economic and military buildings amongst which resource-generating buildings as well as universities, used for researching key technologies. Recruiting and training military units allows players to attack other Provinces to plunder their resources, and defend from enemy attacks. Players may trade their resources with other players after they've built a marketplace on their own territory. The Province grows into an empire through territory annexing and colonizing. Players can communicate with each other using in-game messages, and may join alliances for military and economic co-operation with other players.