Blizzard Entertainment made a multiplayer online RPG called World of Warcraft.
Blizzard Entertainment . Blizzard went on to create several other video games , including Warcraft sequels , the Diablo series , the StarCraft series , and in 2004 the massively multiplayer online role-playing game World of Warcraft . Massively multiplayer online role-playing games ( MMORPGs ) are a combination of role-playing video games and massively multiplayer online games in which a very large number of players interact with one another within a virtual world . As in all RPGs , the player assumes the role of a character ( often in a fantasy world or science-fiction world ) and takes control over many of that character 's actions .