Atlantica Online

Atlantica Online is a free-to-play (F2P) 3D massively multiplayer online role-playing game (MMORPG) developed by NDOORS Corporation. The game is set in an alternate history Earth, the explorable regions including large parts of the world: Europe, Asia, North America, Africa and the mythical and name-giving continent of Atlantis. The setting is fantasy-themed with elements of steampunk and based upon mythological and historical events

http://en.wikipedia.org/wiki/Atlantica_Online