Massively multiplayer online real-time strategy game (
MMORTS) mixes the genres of
real-time strategy and
Massively multiplayer online games, possibly in the form of web browser-based games, in which a very large number of
players interact with one another within a
virtual world. Players often assume the role of a general, king, or other type of figurehead leading an army into battle while maintaining the resources needed for such warfare. The titles are often based in a
sci-fi or
fantasy universe and are distinguished from single or small-scale multiplayer RTSes by the number of players and common use of a persistent world, generally hosted by the game's publisher, which continues to evolve even when the player is offline.