This is a list of massively multiplayer online games (MMOGs), sorted by category. For role-playing games, see list of MMORPGs. (Note: External links are provided here for non-existent articles.)

Action

• Battletech 2035 (cancelled)
• Continuum
• Project Visitor
• Pirates of the Burning Sea (website (http://www.piratesoftheburningsea.com/)) (under development)

Flight simulators

• Aces High
• Fighter Ace

Life setting

• Second Life
• The Sims Online
• There

Browser game

• Earth: 2025 (website (http://games.swirve.com/earth))
• Kings of Chaos
• Pardus (website (http://www.pardus.at/)) (free, open alpha)
• Solar Conflict
• UNIC Battlefield (website (http://battle.unic.net.my/))
• X-Kings (website (http://www.x-kings.com/)) (free)

MMOFPS

• PlanetSide
• World War II Online

See also: MMOFPS

MMORPG

See: List of MMORPGs

MMORTS

• Ballerium
• DarkSpace
• Dune Generations
• Eschaton: Chain of Command
• Mankind
• Project Visitor (formerly 10six)
• Shattered Galaxy
• Sovereign (cancelled before release)
• Trade Wars: Dark Millennium (cancelled before release)

See also: MMORTS

Puzzle

• Yohoho! Puzzle Pirates

Turn-based strategy

• Archmage - now defunct
• Bushtarion ([1] (http://www.bushtarion.com))
• Ferion, browser based space strategy game
• The Five Pillars
• Planetarion, browser based space game
• The Reincarnation (website (http://www.the-reincarnation.com/)), a remake of Archmage
• UNIC Battlefield (website (http://battle.unic.net.my/))
• Warring Factions
• The Lord Archmage (website (http://www.thelord.cl/)), another remake of Archmage
• Utopia_Online ([2] (http://www.games.swirve.com/utopia/))

Game engine

• Arianne