
Achaea, Dreams of Divine Lands is a roleplay-focused, text-based multi-user dungeon (MUD) released on September 9, 1997. It was published by Achaea LLC, now known as Iron Realms Entertainment. Achaea is operated by collecting the revenue through a microtransaction system, which allows payment for the acquisition of in-game benefits.

ArcheAge is an MMORPG developed by Korean developer Jake Song and his development company, XL Games. The game was released in Korea on January 15, 2013, Europe and North America on September 16, 2014. ArcheAge is described as a "sandpark" MMORPG, which the developers say is a hybrid of the open content style of a "sandbox" game and the more structured play experience of a "themepark" game.

Avalon: The Legend Lives is a text-based online multi-player role-playing game world that was first released on 28 October 1989 at the gaming convention Adventure 89. It has maintained a continuous on-line presence with consistent and intact persona files and player history since the late 1980s, rendering it the longest continuously running on-line role-playing game in history.

Black Desert Online is a sandbox-oriented fantasy massively multiplayer online role-playing game (MMORPG) developed by Korean video game developer Pearl Abyss and originally published for Microsoft Windows in 2015. A mobile version titled Black Desert Mobile was initially released in Asia by early 2019, and worldwide in December 2019. The Xbox One and PlayStation 4 versions, known simply as Black Desert, were released in 2019. The game is free-to-play in some parts of the world, but follows a buy-to-play business model in other editions, including the English-language editions.

Blacks & Whites is a multi-player economics-themed board game inspired by Monopoly that was created in 1970 by Robert Sommer and Judy Tart in partnership with Psychology Today.

Cabal Online is a free-to-play, 3D massively multiplayer online role-playing game developed by South Korean company ESTsoft. Different localizations of the game exist for various countries and regions. Although free-to-play, the game makes use of the freemium business model by implementing an "Item Shop", both in-game and via web, allowing players to purchase special premium coins using real currency, in order to acquire exclusive game enhancements and features, useful items and assorted vanity content.

Chronicles of Elyria is a planned massively multiplayer online role-playing game that was in development by Soulbound Studios for Microsoft Windows. The game is described by the developers as utilising a dynamic quest system, and featuring closed economy, finite resource management, need-based NPC's and player-run diplomacy.

Dark Age of Camelot is a 3D massively multiplayer online role-playing game released in October 2001 in North America and in January 2002 in Europe. The game combines Arthurian lore, Norse mythology, and Irish Celtic legends with high fantasy. It is set in the period after King Arthur's death, when his kingdom has split into three realms which are in a constant state of war with each other. Dark Age of Camelot includes both player versus environment (PvE) and realm versus realm (RvR) combat.

Elite is a space trading video game. It was written and developed by David Braben and Ian Bell and originally published by Acornsoft for the BBC Micro and Acorn Electron computers in September 1984. Elite's open-ended game model, and revolutionary 3D graphics led to it being ported to virtually every contemporary home computer system and earned it a place as a classic and a genre maker in gaming history. The game's title derives from one of the player's goals of raising their combat rating to the exalted heights of "Elite".

Elite Dangerous is a space flight simulation game developed and published by Frontier Developments. The player takes the role of a pilot of a spaceship, and explores a realistic 1:1 scale open-world representation of the Milky Way galaxy, with the gameplay being open-ended. The game is the first in the series to attempt massively multiplayer gameplay, with players' actions affecting the narrative story of the game's persistent universe, while also retaining a single-player mode. Elite Dangerous is the fourth game in the Elite video game series, one of the longest-running video game franchises. It is the sequel to Frontier: First Encounters, released in 1995.

Eve Online is a space-based, persistent world massively multiplayer online role-playing game (MMORPG) developed and published by CCP Games. Players of Eve Online can participate in a number of in-game professions and activities, including mining, piracy, manufacturing, trading, exploration, and combat. The game contains a total of 7,800 star systems that can be visited by players.

EverQuest is a 3D fantasy-themed massively multiplayer online role-playing game (MMORPG) originally developed by Verant Interactive and 989 Studios for Windows PCs. It was released by Sony Online Entertainment in March 1999 in North America, and by Ubisoft in Europe in April 2000. A dedicated version for macOS was released in June 2003, which operated for ten years before being shut down in November 2013. In June 2000, Verant Interactive was absorbed into Sony Online Entertainment, who took over full development and publishing duties of the title. Later, in February 2015, SOE's parent corporation, Sony Computer Entertainment, sold the studio to investment company Columbus Nova and was rebranded as Daybreak Game Company, which continues to develop and publish EverQuest.

EverQuest: The Ruins of Kunark is the first expansion to EverQuest, a massive multiplayer online role-playing game (MMORPG), released on April 24, 2000. It introduced a new land area to the game, the continent of Kunark, which had been previously unexplored. Through a mix of in-game events and fiction published on the web by Verant Interactive, the storyline of the discovery of Kunark was established.

Federation of Free Traders is a space trading video game released in 1989 for the Amiga and Atari ST. The game is similar in scope to Elite, involving space simulation and exploration tilted towards trading. The player is tasked with exploring and discovering the billions of procedurally generated galaxies and planets. The game was developed and published by Gremlin Interactive.

Final Fantasy XI, also known as Final Fantasy XI Online, is a massively multiplayer online role-playing game (MMORPG), originally developed and published by Squaresoft and then published by Square Enix as the eleventh main installment of the Final Fantasy series. Designed and produced by Hiromichi Tanaka, it was released in Japan on May 16, 2002, for PlayStation 2 and Microsoft Windows-based personal computers in November of that year. The game was the first MMORPG to offer cross-platform play between PlayStation 2 and personal computer. It was also the Xbox 360's first MMORPG. All versions of the game require a monthly subscription to play.

Foxhole is a cooperative sandbox massively-multiplayer action-strategy video game being developed and published by Canadian video game company Siege Camp, who are based in Toronto, Ontario. The game uses Unreal Engine 4, utilizing an axonometric projection perspective, much like that of a conventional real-time strategy video game with a top-down view. The game allows the user to join one of two factions as a soldier, having the choice of contributing to a persistent war by organizing, acquiring and transporting resources as well as supplies, providing manpower and vehicles in combat, building and managing fortifications and upgrading production facilities with the end goal of annihilating the opposition. The game has been in alpha-stage since 28 July 2017, with a planned full release on Microsoft Windows.

Frontier: Elite II is a space trading and combat simulator video game written by David Braben and published by GameTek in October 1993 and released on the Amiga, Atari ST and DOS. It is the first sequel to the seminal game Elite from 1984.

Gaia Online is an English-language, anime-themed social networking and forums-based website with Chibi-style animations. It was founded as go-gaia on February 18, 2003, and the name was changed to GaiaOnline.com in 2004 by its owner, Gaia Interactive. Gaia originally began as an anime linklist and eventually developed a small community, but following a statement by founder Derek Liu, the website moved towards social gaming and eventually became forum-based.

Geewa is a Czech mobile games developer based in Prague. Founded in 2005, the company develops and publishes casual competitive multiplayer games for mobile devices. Geewa was awarded the Red Herring 100 Europe award in 2013 and is best known for their games Smashing Four and Pool Live Tour. In 2017 Geewa lost CZK 18 mio. on sales CZK 26 mio., cumulated loss increased to CZK 174 mio.

Habbo is an online community aimed at teens and young adults. It is owned and operated by Sulake, a Finnish company. Founded in 2000, Habbo has expanded to nine online communities, with users from more than 150 countries. Since August 2012, more than 273 million avatars have been registered with an average of 5 million unique visitors per month.

MegaZebra is a game development company located in Munich, Germany. The company develops free-to-play games for social networks like Facebook and mobile devices, such as smartphones and tablets. As of July 2018, the company employs 55 people.

Monopoly is a multi-player economics-themed board game. In the game, players roll two dice to move around the game board, buying and trading properties, and developing them with houses and hotels. Players collect rent from their opponents, with the goal being to drive them into bankruptcy. Money can also be gained or lost through Chance and Community Chest cards, and tax squares. Players receive a stipend every time they pass "Go", and can end up in jail, from which they cannot move until they have met one of three conditions. The game has numerous house rules, and hundreds of different editions exist, as well as many spin-offs and related media. Monopoly has become a part of international popular culture, having been licensed locally in more than 103 countries and printed in more than 37 languages.

Monopoly money is a type of play money used in the board game Monopoly. It is different from most currencies, including the American currency or British currency upon which it is based, in that it is smaller, one-sided, and does not have different imagery for each denomination. It is not legal tender and has no monetary value in any jurisdictions.

Neopets is a virtual pet website. Users can own virtual pets ("Neopets"), and buy virtual items for them using one of two virtual currencies. One currency, called Neopoints, can be earned within the site, and the other, Neocash, can either be purchased with real-world money, or won by chance in-game.

OfferUp is an online mobile-first C2C marketplace with an emphasis on in-person transactions. It was founded as a competitor to Craigslist, differentiating itself with mobile-friendly apps and user profiles with ratings.

Old School RuneScape is a massively multiplayer online role-playing game (MMORPG) developed and published by Jagex. The game was released on 22 February 2013. When Old School RuneScape launched, it was originally an August 2007 version of RuneScape, which was highly popular prior to the launch of RuneScape 3. The game has since received engine improvements, new content, and quality of life updates largely decided by in-game polls. Despite having a smaller development team and a slower relative update schedule, Old School RuneScape has a larger player-base than RuneScape. A mobile version for Android and iOS was released in October 2018.

Pardus is a graphical browser-based MMORPG written in PHP and C/C++ and set in a futuristic universe where players interact and compete in space. It is a persistent-universe, open-ended game with a player-driven economy. Players travel through hundreds of "sectors" or solar systems while trading, building or battling with Non-Player Characters (NPCs) and other players. There are dozens of spacecraft models in Pardus, which can be customized with different weapons, armor and other equipment. Pardus characters do not have a defined 'class'.

Perpetuum is a video game by Avatar Creations Ltd. It is a player-driven persistent-world MMORPG set in a science fiction ground setting. Players pilot customisable robots on various islands connected by several teleports. These islands are either alpha or beta/gamma, meaning players can freely engage each other.

Pioneer is a free and open source space trading and combat simulator video game inspired by the commercial proprietary Frontier: Elite 2. It is available for Linux, and Microsoft Windows.

The Sims Online, also known as EA-Land, was a massively multiplayer online variation on Maxis' computer game The Sims. It was published by Electronic Arts and released in December 2002 for Microsoft Windows. The game was sold in retail stores in North America and Japan and could also be downloaded worldwide through the EA.com online store, though the game was English-only and had no official translations. The game charged a subscription fee of US $9.99 per month. In March 2007, EA announced that the product would be re-branded as EA-Land and major enhancements would be made. About a year later, EA announced that the game would shut down all activity on August 1, 2008.

Spiral Knights is a massively multiplayer online game created by Three Rings Design and now owned by Grey Havens. The free-to-play, Java-based game was released in 2011 and is still updated occasionally.

Star Citizen is an in-development multiplayer space trading and combat simulation game developed and published by Cloud Imperium Games for Microsoft Windows. A spiritual successor to 2003's Freelancer, Star Citizen is being led by director Chris Roberts. The game was announced in 2012 through a successful Kickstarter campaign which drew in over US$2 million. Pre-production of the game began in 2010, with production starting in 2011.

Star Wars Galaxies is a Star Wars themed massively multiplayer online role-playing game (MMORPG) for Microsoft Windows, developed by Sony Online Entertainment and published by LucasArts.

Temtem is a massively multiplayer online role-playing game (MMORPG) developed by Spanish development studio Crema, and published by Humble Bundle. The game was released in early access through Steam on January 21, 2020, and PlayStation 5 on December 8, 2020 with the Nintendo Switch and Xbox Series X/S versions of the game scheduled to release in 2021. The game uses the Unity development engine, and is a creature-collection video game greatly inspired by Nintendo's Pokémon series. The game was partly funded through the crowdfunding platform Kickstarter, from May to June 2018.

Twinity is a 3D online virtual world. Initially developed by Metaversum GmbH, it is currently held by ExitReality. The game offers its population, called Twinizens, to navigate around virtual (historical) versions of real-world cities, also called a mirror world or a Metaverse. A public beta began in September 2008 with the release of the first virtual city, Berlin, which later was followed by Singapore, London, Miami and New York. Twinity is built on BigWorld Technology and its economy is based on a free-to-play model.

World of Warcraft (WoW) is a massively multiplayer online role-playing game (MMORPG) released in 2004 by Blizzard Entertainment. Set in the Warcraft fantasy universe, World of Warcraft takes place within the world of Azeroth, approximately four years after the events of the previous game in the series, Warcraft III: The Frozen Throne. The game was announced in 2001, and was released for the 10th anniversary of the Warcraft franchise on November 23, 2004. Since launch, World of Warcraft has had eight major expansion packs: The Burning Crusade (2007), Wrath of the Lich King (2008), Cataclysm (2010), Mists of Pandaria (2012), Warlords of Draenor (2014), Legion (2016), Battle for Azeroth (2018), and Shadowlands (2020).

Zynga Inc. is an American social game developer running social video game services and founded in April 2007 with headquarters in San Francisco, California, United States. The company primarily focuses on mobile and social networking platforms. Zynga states its mission as "connecting the world through games."

