Tibia is a massively multiplayer online role-playing game (MMORPG) created by CipSoft. It is one of the oldest MMORPGs and was considered most noteworthy in its early years; however, with the development of MMORPGs, its popularity has grown much slower than other MMORPGs. It was first released in January 1997. It is a free game which is open to the public, though players have the option to pay a fee in order to upgrade to a premium account, granting special in-game benefits, including additional areas to explore, access to vocation promotions, and extra spells.
Source: Wikipedia, "[en.wikipedia.org/wiki/Tibia_%28video_game%29 Tibia (video game)]", available under the CC-BY-SA License.