Massively multiplayer online hack and slash
Massive(ly) multiplayer online hack and slash (MMOHNS) are not quite role-playing video games but only Hack and Slash. The gameplay revolves around the near-constant [...] of computer controlled Non-player characters (NPC) and mobs (creatures in a game) to make your characters more powerful. Many games that are classified as MMORPG probably fall into this category more than they fall into the MMORPG category. The main difference between the two being the social interaction aspect. Where an RPG should have more social interaction between players and NPCs the HNS requires little or no interaction between them. This term is coming into more and more widespread usage as more and more MMOG are created that lack the full characteristics of an RPG. This is still a hotly debated area in that many game developers believe the RPG needn't focus on actual role-playing and storyline.
Games that fall into this category vary depending on the person creating the list. Many say that World of Warcraft, one of the games best known as an MMORPG is actually an MMOHNS. More recent games to fall into this caetgory probably include Sword of The New World Granado Espada, EUDemons Online and a host of others.