Blizzard
- World of Warcraft (2004-Present)
- Unnamed Title
CCP
- Eve Online (2003-Present)
- World of Darkness
- DUST
Funcom
- Age of Conan (2008-Present)
- Anarchy Online (2001-Present)
- The Secret World
GamersFirst
- All Points Bulletin: Reloaded (2011-Present) [Acquired from Realtime Worlds]
- 9Dragons (2007-Present) [Developed by Indy21]
- Fallen Earth (2009-Present) [Developed by Icarus Studios
- Hukumdar Online
- Knight Online (2004-Present) [Developed by MGame Corporation]
- Metal Knight Zero
- OurWorld
- Sonsuz Macera
- Sword2 (2007-Present) [Developed by IMC Games Co, LTD]
- Taikodom
- Victory: The Age of Racing
- WarRock (2004-Present) [Developed by Dream Execution]
Gala-Net Inc.
- Luna Online
- Flyff (2005-Present) [Developed by Gala Lab]
- Rappelz (2009-Present) [Developed by Gala Lab]
- Tales Runner [Developed by RHAON]
- Aika Online (2010-Present) [Developed by Hanbitsoft, Currently T3 Entertainment]
- Allods Online (2010-Present) [Developed by Astrum Nival]
- Corum Online
- Upshift Strikeracer
- Heroes of Gaia (2009-Present) [Developed by Suzhou Snail Electronic Co., Ltd.]
Gazillion Entertainment
Auto Assault (Defunct)Lego Universe Online (Sold to Lego)- Jumpgate Evolution
- Marvel Universe
- Marvel Super Squad Online (2011-Present)
Hi-Rez Studios
- Global Agenda (2010-Present)
- Tribes MMO
Jagex
- Runescape (2001-Present)
- War of Legends (2010-Present) [Developed by Ultizen]
- Planetarion (2000-Present) [Developed by Renegade Games]
- 8Realms (2011-Present)
- Stellar Dawn
- Transformers Online
Mythic/EA/Bioware
- Dark Age of Camelot (2001-Present)
- Star Wars: The Old Republic (2011-Present)
- Ultima Online (1997-present)
- Warhammer Online (2008-Present)
NCsoft
- Aion (2008-Present)
Auto Assault (Defunct)- Blade and Soul
- City of Heroes (2004-Present)
Dungeon Runners (Defunct)Exteel (Defunct)- Guild Wars (2005-Present)
- Guild Wars 2
- Lineage (1998-Present) [Shut down in NA/EU: 6/29/11]
- Lineage II (2003-Present)
- Lineage Eternal
- Wildstar Online
Tabula Rasa (defunct)
Perfect World Entertainment
- Battle of the Immortals (2008-Present)
- Champions Online (2009-Present) [Acquired with Cryptic Studios]
- Forsaken World (2010-Present)
- Ether Saga (2009-Present)
- Jade Dynasty(2009-Present)
- Perfect World International (2006-Present)
- Star Trek Online (2010-Present) [Acquired with Cryptic Studios]
Quest Online
- Alganon (2009-Present)
- Line of Defense
- Galactic Command MMO
Sony Online Entertainment
The Agency (Defunct)- Everquest (1999-Present)
- Everquest 2 (2004-Present)
- Everquest Online Adventure (2003-Present)
- Everquest Next
- DC Universe Online (2011 – Present)
- Free Realms (2009-Present)
- Infantry (1999-Present)
The Matrix Online (2005-2009) (Defunct)- Pirates of the Burning Sea (2008-Present)
Star Wars Galaxies (2003-2011) (Defunct)- Star Wars: Clone Wars Adventures (2010-Present)
- Vanguard (2007-Present)
- Planetside (2003-Present)
- Planetside Next
Square Enix
- Final Fantasy XI (2002-Present)
- Final Fantasy XIV (2010-Present)
Fantasy Earth Zero (2006-2006) (Sold to Gamepot)
Turbine Entertainment
- Asheron’s Call (1999-Present)
Asheron’s Call 2 (Defunct)- Dungeons and Dragons Online (2006-Present)
- Lord of the Rings Online (2007-Present)
Ubisoft
Shadowbane (Defunct)- Heroes of Might and Magic Kingdoms [France] (2009-Present)
Key: Pink: Free to Play option Green: Unreleased Strike: Defunct