Omerta 3
—Text-based mafia MMORPG · Free-to-play
Category
Browser MMOs
Browse 559 browser mmos in MMOFinder with researched status, platforms, business models, combat styles and related MMO features.
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Use this category alongside Find an MMO, platform hubs, and Compare to narrow the catalog by the features that matter to you.
Related discovery hubs include MMORPGs, Sandbox MMOs, Crafting, Open World, and PvE.
Once Upon A MOO
2000Fantasy social MOO · Free-to-play
One Piece Online
—Browser MMORPG · Free-to-play
One Piece Online 2: Pirate King
—Browser Turn-Based MMORPG · Free-to-play
Online Boxing Manager
2012Sports management browser MMO · Free to play (donation-supported)
Online Tennis Manager
2013Sports management simulation MMO · Free-to-play
Orbitarion
2026Sci-fi turn-based MMO strategy · Free-to-play
Origins Return
—Browser space MMORTS · Free-to-play
Orion's Belt
2009Browser turn-based sci-fi MMO strategy · Free to play
OtherSpace
1998Science-fiction roleplay MUSH/MMORPG · Free-to-play
Outer Directive
2026Browser 4X space MMO · Free-to-play
Outwar
2002Text-based browser MMORPG · Free-to-play
Overkings
—Fantasy browser MMORPG · Free-to-play
OverSoul
—Browser card battle game · Free-to-play
Oz World
—Social virtual world · Free-to-play
Pardus
2004Persistent browser space MMORPG · Free-to-play with optional premium features
Pentito
2026Browser crime MMO · Free-to-play
Phoenix (CyberDjinn)
2001Persistent browser strategy MMO · Free-to-play
Pirate Galaxy
—Browser MMO · Free-to-play
Pirate Storm
—Naval action MMO · Free-to-play
Pirates: Tides of Fortune
2012Browser MMORTS · Free-to-play
Pixadom
20232D social pixel-art MMORPG · Free-to-play / supporter items
PixelRealm
2026Browser pixel-art MMORPG · Free-to-play
PixMMO
2026Pixel browser MMO RPG · Free-to-play
Planetarion
2000Sci-fi turn-based MMO strategy · Not yet verified
Play MajorMUD
1990Fantasy BBS MUD/MMORPG · Free-to-play
Pocket Legends
2010Cross-platform mobile fantasy MMORPG · Free-to-play with optional purchases
Pockie Kingdom
2013Browser MMO strategy · Free-to-play
Pockie Ninja
—Browser RPG · Free-to-play
Pockie Pirates
—Browser online RPG · Free-to-play
Pockie Saints
2013Browser MMO ARPG · Free-to-play
Poptropica
2007Family-friendly online adventure world · Free browser access with optional paid editions
Pox Nora
2006Fantasy turn-based MMO strategy · Free to play with item shop
Primal Darkness
2026Fantasy MUD/MMORPG · Free-to-play
Prison Struggle
—Text-based browser MMO · Free-to-play
Procedural Realms
2013Fantasy MUD/MMORPG · Free-to-play
Project Zero-G
2026Persistent space simulation MMO · Free-to-play alpha
Prosperous Universe
2021Browser space economy MMO · Free-to-play with optional Premium subscription
PURGE://
2026Persistent browser action MMO · Free-to-play
Purple Dragon
2026Fantasy MUD/MMORPG · Free-to-play
PVP.FARM
20263D sci-fi browser MMORPG · Free-to-play open beta
QuickHit Football
2009Browser sports MMO · Free-to-play
Race War Kingdoms
2001Browser fantasy MMORPG · Free-to-play
Radiant Heart MUSH
2023Magical-girl roleplay MUSH/MMORPG · Free-to-play
Rage of 3 Kingdoms
—Browser/Mobile MMORTS · Free-to-play
RageWar
—Browser strategy MMO · Free-to-play
Ragnarok Click H5
—Browser MMORPG · Free-to-play
Ragnarok Journey
—Browser fantasy MMORPG · Free-to-play
Rail Nation
—Browser strategy MMO · Free to play
Ravenmarch: Empire in Flames
2014Browser strategy MMO · Free to play
Realm of Echoes
20263D browser fantasy MMORPG · Free-to-play
Realms of Corl
2000Fantasy MUD/MMORPG · Free-to-play
Realms of Despair
1994Fantasy MUD/MMORPG · Free-to-play
Realms of Elynia
2026Browser gladiator MMORPG · Free-to-play
Realms of the Dragon
1992Fantasy LPMud/MMORPG · Free-to-play
Redemption
1996Fantasy MUD/MMORPG · Free-to-play
Reign
2004Browser MMO strategy · Free-to-play
Reinos de Leyenda
1996Spanish fantasy MUD/MMORPG · Free-to-play
RetroMMO
2020Retro turn-based MMORPG · Free-to-play / optional subscription
RetroMUD
1994Fantasy MUD/MMORPG · Free-to-play
Revelation: Fire and Ice
—Browser fantasy MMORPG · Free-to-play (closed)
RiotZone
—Militaristic Browser MMORTS · Free-to-play
Rise of Empire
2012Browser MMORTS · Free to play
Rise of the Tycoon
2012Business and political strategy MMO · Free-to-play
Rising of King
2013Browser strategy MMO · Free to play
Rites of Passage MUD
2025Fantasy PvP/PvE MUD/MMORPG · Free-to-play
Rivality
2008Contemporary MMORTS · Free to play
Rockfree
2009Browser rhythm MMO · Free to play
Romadoria
—Browser MMORTS · Free-to-play
Rulers of the Sea
—Historical sandbox MMORPG · Free-to-play (planned)
Samurai Taisen
—Browser MMORTS with visual-novel elements · Free-to-play
SaturnFable
2026Browser turn-based MMORPG · Free-to-play / founder support
Seas of Gold
2016Browser naval strategy MMORPG · Free-to-play
Seattle2064
2025Cyberpunk roleplay MUD/MMORPG · Free-to-play
Serenia Fantasy
2012Browser MMORPG · Free-to-play
Seven Seas Saga
2013Browser pirate MMO · Free-to-play
ShadowMUD
1990Fantasy MUD/MMORPG · Free-to-play
Shadowrealm: Age of Darkness
2026Dark-fantasy browser MMORPG · Free-to-play
Shadowrun - Denver
2000Cyberpunk roleplay MUSH/MMORPG · Free-to-play
Shakes & Fidget
2009Idle browser and mobile fantasy MMO · Free-to-play
Siege on Stars
—Browser space MMORTS · Free-to-play
Siegelord
2014Browser MMORTS · Free-to-play
Sindome
1997Cyberpunk roleplay MOO/MMORPG · Free-to-play
SlothMUD III
1992Fantasy MUD/MMORPG · Free-to-play
Soldiers Inc.
2013Browser MMORTS · Free-to-play
Soul of Guardian
—Browser action fantasy MMORPG · Free-to-play
Soul Order Online 2
—Fantasy MMORPG · Free-to-play
Source of Mana
2022Open-source 2D MMORPG · Free / open source
Space Heroes Universe
2011Kids' virtual-world MMO · Free to play (freemium membership)
Sparta: War of Empires
2014Browser MMORTS · Free-to-play
Spellstone
—Online card game · Free-to-play
Star Colony
2011Browser strategy MMO · Free to play
Star Corsairs
2011Browser space MMO · Free-to-play
Star Supremacy
—Browser sci-fi MMORTS · Free-to-play
Star Trek: Infinite Space
—Browser Space MMO (never released) · Not applicable; the game was never released
Star Wars: Age of Alliances
2001Science-fiction roleplay MUSH/MMORPG · Free-to-play
Star Wars: Dark Forces RPG
2024Science-fiction roleplay MUD/MMORPG · Free-to-play
Star Wars Mud
1993Science-fiction LPMud/MMORPG · Free-to-play
Star Wars MUSH
1990Science-fiction roleplay MUSH · Free-to-play
Star Wars: Regicide
2020Science-fiction roleplay MUSH/MMORPG · Free-to-play
Starlight Story
2013Browser MMORPG · Free-to-play
Starmourn
2018Text-based sci-fi MMORPG / MUD · Free-to-play
SteelWar Online
—Robot-piloting browser MMO (strategy/RPG hybrid) · Free-to-play
Stein.world
—Browser/Steam Fantasy MMORPG · Free-to-play
Stellar Dawn
N/AScience fiction MMORPG · Not yet verified
Stendhal
2005Open-source 2D fantasy MMORPG · Free-to-play / open source
Storm Riders
—Wuxia browser MMORPG · Free-to-play
Stormfall: Age of War
2012Fantasy MMORTS · Free-to-play
StormHunters
2005Fantasy MUD/MMORPG · Free-to-play
Stormthrone
2015Fantasy browser MMORPG · Free-to-play
Sundering Shadows
2000Pathfinder/D&D-style fantasy MUD/MMORPG · Free-to-play
Supremacy 1914
—Persistent World War I grand-strategy MMO · Not yet verified
Sword of Destiny: Rise of Aions
—Browser Action MMORPG · Free-to-play
Swords of Divinity
2016Automated-combat team-collector RPG (not a persistent MMO) · Free to play
Syrnia
2005Text-based medieval browser MMORPG · Free-to-play
Tales of Laputa
—Browser MMORPG · Free-to-play
Tales of Solaris
—Browser MMORPG · Free-to-play
Tales of Yore
2023Casual persistent 2D online RPG · Free-to-play / in-app purchases
Tamer Saga
—Browser MMORPG · Free-to-play
TempusMUD
1990Fantasy/sci-fi time-travel MUD/MMORPG · Free-to-play