MUD are a class of multi-user real-time virtual worlds, usually but not exclusively text-based, with a history extending back to the creation of MUD1 by Richard Bartle in 1978. MUD were the direct predecessors of MMORPG. Other notable games A social deduction game is a multiplayer online game in which players attempt to uncover each other's hidden role or team allegiance using logic and deductive reasoning, while other players can bluff to keep players from suspecting them. A notable example of the social deduction video game is Among Us, which received a massive influx of popularity in 2020 due to many well-known Twitch streamers and YouTubers playing it. Among Us has also inspired internet memes and achieved a very large following online. Online game governance Online gamers must agree to an End-user license agreement (EULA) when they first install the game application or an update. EULA is a legal contract between the producer or distributor and the end-user of an application or software, which is to prevent the program from being copied, redistributed or hacked. The consequences of breaking the agreement vary according to the contract. Players could receive warnings to termination, or direct termination without warning. In the 3D immersive world Second Life where a breach of contract will append the player warnings, suspension and termination depending on the offense. Where online games supports an in-game chat feature, it is not uncommon to encounter hate speech, sexual harassment and cyberbullying. Players, developers, gaming companies, and professional observers are discussing and developing tools which discourage antisocial behavior. There are also sometimes Moderators present, who attempt to prevent anti-Social behavior. Recent development of gaming governance requires all video games (including online games) to hold a rating label. The voluntary rating system was established by the Entertainment Software Rating Board (ESRB). A scale can range from "E" (stands for Everyone) inferring games that are suitable for both children and adults, to "M" (stands for Mature) recommending games that are restricted to age above 17. Some explicit online games can be rated "AO" (stands for Adult Only), identifying games that have content suitable for only adults over the age of 18. Furthermore, online games must also carry an ESRB notice that warns that any "online interactions are not rated by the ESRB". Shutdown of games The video game industry is highly competitive. As a result, many online games end up not generating enough