OGame is a popular strategy-based space simulation game in which you, using only a standard web browser, play as an intergalactic emperor and compete to strengthen your galactic influence by means of numerous strategies. You begin in your homeworld, in which your main goal is to build a militant and economic infrastructure using available resources. You may research new techniques, which allows you access to superior technologies and better weapon systems.
The game gives you the option to colonize planets and form pacts (alliances) with other friendly emperors. Attacking and trading with other players helps you earn resources necessary to advance in the game.