Imperia Online is a persistent, browser-based, massively multiplayer, online real-time strategy game developed by the Bulgarian game production company Imperia Online JSC. 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 40 million registered users. The game is currently in its sixth version, but there are still active Version 5 realms.