Earthrise is a science fiction Player vs Player MMORPG by the independent Bulgarian team Masthead Studios released on February 2011.Iit is Masthead's first video game.
The game takes place in a post-apocalyptic setting where the surviving population of the Earth has built a new society ruled by a totalitarian government while armed factions fight for resources and power within the new system. Among other features, a few of note are a skill-based advancement system, a player-driven economy and an emphasis on free PvP. The game uses the Earthrise Engine, an engine that will be used for Masthead's upcoming Fallout Online.
Source: Wikipedia, "Earthrise (video game)", available under the CC-BY-SA License.