An MMO game, or massively multiplayer online game, is an online video game that allows a large number of players to play on the same server simultaneously. MMOs usually feature a huge, persistent open world, although there are games that differ. These games can be found for most network-capable platforms, including the personal computer, video game console, or smartphones and other mobile devices. MMOs can enable players to cooperate and compete with each other on a large scale, and sometimes to interact meaningfully with people around the world. They include a variety of gameplay types, representing many video game genres.
MMORPG, or massively multiplayer online role-playing game, is a subgenre of MMOs that belong to the RPG genre. They are role-playing games that can be played online by a large number of players simultaneously. The difference between MMO and MMORPG is that all MMORPGs are MMOs, but not all MMOs are MMORPGs. MMORPG is by definition an RPG, while an MMO can be anything from a Battle Royale action title, a real-time strategy game, or even a new type of interactive experience that defies genres.
Monetization in MMOs can vary, but they are often live services that use the same season pass, cosmetics, and other methods used in PvP games.
