Table:
text: List of free multiplayer online games
Free to play
Free to play
Developers Release_date Required_OS Genre Type_
Robot Entertainment , Gas Powered Games August 16, 2011 Windows MMORTS 3D
EA Games 2009 Windows First-person shooter 3D
Stunlock Studios 2011 Windows MOBA 3D
THQ 2010-2011 Windows Real-time strategy 3D
Novel, Inc. 2011 Windows MMORPG 2D
Masthead Studios 2013 Windows Third-person shooter 3D
Riot Games 2008-2011 Windows , OS X MOBA 3D
Valve Corporation 2007 Windows , OS X , Linux First-person shooter 3D

Question: What kind of 3D game was released in the list of free to play multiplayer online games between 2008 and 2011?

Question: In the list of free multiplayer online games, when did Riot Games release their 3D MOBA game Free to Play?

Question: List of Free Multiplayer Online Games, When Did Masthead Studios Release Their Free Game?

Question: What kind of 3D game did Valve Corporation release in the list of free-to-play multiplayer online games?

Question: List of free multiplayer online games "Free to Play", what is the minimum operating system required for the game by Stunlock Studios?