Rift

Rift (previously known as Rift: Planes of Telara and as Heroes of Telara before that while still in alpha testing) is a fantasy free-to-play massively multiplayer online role-playing game developed by Trion Worlds. Rift takes place within the fantasy world of Telara. Two competing factions, composed of a selection of races and classes, battle each other and the enemies who emerge from dynamic "rifts". (https://en.wikipedia.org/wiki/Rift_ (video_game))