EVE Online

This MMOG is about Space, Spaceships, Politics, and Power. It's comprised of a massive single persistent PvP world that's hosted on a single 'supercomputer' managed by the game developer.

It's huge. Massively huge. Pop out the map interface and you zoom out from your current star system to a view of the entire galaxy.. thousands of stars, all with corresponding solar systems, planets, nebulas, asteroids, space stations.

Your in control of a spaceship that you can upgrade, sell, or trade in for another better class of spaceship. You gain in game currency through mining, trade, bounty hunting, pirating and/or certain odd jobs.

There's 4 races, all descended from Humans, and 4 federations that each control a segment of protected space. To travel in a solar system, warp drive is available, and to travel between star systems, you must use a stargate. The resulting star map resembles a massive internet-like network of connected star systems. Each star system has a security rating that varies from 0.0 to 1.0 based on your federation's strength in that system. 0.0 is like the wild wild west. It's persistent territory that anybody in the game can claim as their own. Venture there only if you've got the strength to sustain pirates and/or attacks from the corporations that have claimed that space previously.