Please explain the difference between the action game ACT and the action role-playing game ARPG and those MMORPG on online games. Please explain.

A.RPG: action+role-playing

MMORPG massively multiplayer online role-playing courseware.

Action game, referred to as ACT. A game type is a generalized game type. Games with "action" as the main game form can be counted as action games, including "shooting games" and "fighting games". After 2005, there are few simple action games, because there are various forms of "action". The horizontal game about card design can be called action game.

Role-playing game, abbreviated as RPG. A game type, a generalized game type. In the game, the player is responsible for playing this role in the real or fictional world. Players are responsible for playing one or more roles and developing their roles through some actions under structured rules. The success or failure of players in this process depends on the formal rule system or action process.

A massively multiplayer online game refers to a game in which a large number of players can be online at the same time on a multiplayer server.