The very popular OGame is a space war themed massively multiplayer online browser game with over two million players. All universes of the "OGame" consist of galaxies, systems, and planet slots. Sending fleets between different galaxies takes the longest time, whereas, if a player sends a fleet to a planet within the same system it takes the least time. Each player starts with one planet that has 163 fields for building upgrades, in a random system and galaxy. His entire empire may consist of up to 9 planets. A Player can do research, missions and construction which needs the resources metal, crystal, deuterium, energy and dark matter. These precious recourses can be gained by trading or mining, for example. To determine which player is the best they are measures by their spent recourses.

Whenever fleets or defences meet in OGame combat occurs that lasts for 1-6 rounds. Players can attack other fleets or planets to get the recourses of other players or to collect the debris which is left of destroyed spacecrafts. Players should build defence systems on their planets to avoid losing their metals and crystals. The players can also form alliances to protect each other from attacks or to be a stronger force when raiding other planets. The valuable Dark Matter can be used to hire a merchant. That way, one resource type can be traded for another. The OGame is the perfect game for lovers of the Scifi Genre and space travels: It's a Brower Game that captures the flair of colonization in space.