List of massively multiplayer online games
This is a list of notable massively multiplayer online games, sorted by category.
Massively multiplayer online turn-based strategy games
Action
| Game | Developer | Initial Release Date | Server Close Date | |
| Armored Warfare | MY.Games, Obsidian Entertainment | 2015 | ||
| Cartoon Network Universe: FusionFall | Cartoon Network, Grigon Entertainment | January 13, 2009 | August 29, 2013 | |
| CrimeCraft | Vogster Entertainment | 2009 | August 31, 2017 | |
| DC Universe Online | Dimensional Ink Games | January 11, 2011 | ||
| Infantry Online | Sony Online Entertainment | 1999 | March 2012 | |
| SubSpace | Virgin Interactive | 1997 | ||
| War Thunder | Gaijin Entertainment | December 21, 2016 | ||
| World of Tanks | Wargaming | August 12, 2010 | ||
| World of Warplanes | Wargaming | 2013 | ||
| World of Warships | Wargaming | September 17, 2015 |
Browser games
Agar.ioBin WeevilsBlood WarsCastle of HeroesClub PenguinCommand & Conquer: Tiberium AlliancesDark OrbitEmpire & StateGlitchHattrickIkariamIllyriadImperia OnlineLittle Space HeroesLord of UltimaMiniconomyMoshi MonstersNational Geographic Animal JamNEO ShiftersOgameOmertaPardusPirate GalaxyPlanetarionPoptropicaRealm of the Mad GodRunes of MagicSamurai TaisenSentou GakuenSlither.ioSmallworldsSurviv.ioTenviTerra MilitarisTirNuaTransformiceTravianTribal WarsTwin SkiesUrban Dead- ''World of the Living Dead: Resurrection''
Browser games with [3D rendering]
Battlestar Galactica OnlineDark Orbit Dead FrontierFamily Guy OnlineFragoriaFree RealmsRuneScape- ''Tanki Online''
Building games
Active Worlds- ''Wurm Online''
Exploration
- ''Uru Live''
Puzzle
Social games
Active WorldsAnimal Jam ClassicBin WeevilsEGOFlyffFree RealmsFurcadiaHabboJumpStartNicktropolisOurWorldPirate101 Red Light CenterSecond LifeThe Sims OnlineSmallWorldsStar Wars CombineStar Wars: The Old Republic- Tanki OnlineThereTirNuaToontown OnlineTransformiceVirtual Magic KingdomVirtual World of KanevavSideWizard101
- ''Woozworld''
Space simulation
Dual UniverseElite Dangerous- ''Eve Online''