In the THQ thread, someone asked for the complete list of studios closed since the start of the generation. Mario (from Sidhe) answered with a partial list, since it didn't include 2011 (and 2012). Using his list as a starting point (thanks), I took some time to add many missing studios. I won't pretend it's an exhaustive list yet, but with your help we can reach that goal.
I decided to start in 2006, but some may argue that it's too early since the generation started in November 2005. When possible, I added the year every studio was closed and a link confirming the news. If you want to add a studio missing from the list, providing a link and the year of death would be appreciated. Gamasutra was my main source, because they were around in 2006 and they are reliable and credible.
Note: some studios were merged over the year, and I didn't include them. For example, The Collective and Shiny Entertainment became Double Helix in 2008. Another one: SouthPeak bought Gamecock. Recently, Artoon, Cavia and Feel Plus were absorbed into AQ Interactive. I guess we could argue in this thread whether or not these studios deserve to be in this list or not.
One last point: yes, this list is depressing, but I'm pretty sure the list of studios created from 2006-2012 is much longer than the one below.
38 Studios - 2012
3D Realms - 2009
4mm Games - 2012
7 Studios (Activision) - 2011
ACES Studio (Microsoft) - 2009
Action Forms - 2009
Artech Studios - 2011
Ascaron - 2009
Atomic Elbow - 2008
Backbone Vancouver
Beam Software/Melbourne House - 2010
BigBig (Sony) - 2012
Big Huge Games - 2012
Bizarre Creations (Activision) - 2010/2011
Black Hole Entertainment - 2012
Black Rock (Disney) - 2011
Blue Fang Games - 2011
Blue Tongue (THQ) - 2011
BottleRocket - 2009
Brash Entertainment - 2008
Budcat (Activision) - 2010
Carbonated Games - 2008
Castaway Entertainment - 2008
Cavia - 2010
Cheyenne Mountain - 2010
Cing - 2010
Clover Studios (Capcom) - 2006
Codemasters Guildford - 2011
Cohort Studios - 2011
Concrete Games - 2008
Dark Energy Digital - 2012
Deep Silver Vienna - 2010
DICE Canada - 2006
Digital Anvil - 2006
EA Chicago - 2007
EA Bright Light - 2011/2012
EA Japan - 2007
EA Victory Games - 2013
Eden Games - 2012
Eidos Manchester - 2009
Eidos Hungary - 2010
Empire Interactive - 2009
Ensemble Studios (Microsoft) - 2008
Étrange Libellules - 2012
Eurocom - 2012
Factor 5 - 2009
FASA (Microsoft) - 2007
Fizz Factor - 2009
Flagship Studios - 2008
Flight Plan - 2010
Frozen North Productions
Funcom Beijing - 2013
FuzzyEyes - 2009
Gaia
Gamelab - 2009
Game Republic - 2011
GRIN - 2009
Groove Games - 2010
Gutso Games
HB Studios Halifax - 2012
Helixe (THQ) - 2008
Hogrocket - 2012
Hudson Entertainment - 2011
Hudson Soft - 2012
Humannature Studio (Nexon Vancouver) - 2009
Ignition London - 2010
Ignition Florida - 2010
ImaginEngine - 2012
Impossible Studios - 2013
Incognito Entertainment (Sony) - 2009
Indie Built (Take-Two) - 2006
Iron Lore - 2008
Juice Games (THQ) - 2011
Junction Point - 2013
Kaos Studios (THQ) - 2011
Killaware - 2011
Killspace Entertainment - 2011
KMM Brisbane - 2011
Kuju Manila - 2009
Kuju Chemistry - 2009
Kush Games - 2008
Locomotive Games (THQ) - 2010
Loose Cannon Studios - 2010
Luxoflux - 2010
Mass Media (THQ) - 2008
Microsoft Game Studios Vancouver - 2012
Monte Cristo - 2010
Monumental Games - 2012
Midway Austin - 2009
Midway Newcastle - 2009
MTV Games - 2011
Multiverse - 2012
NetDevil - 2011
Ninja Studio - 2009
Nihon Telenet - 2007
Outerlight - 2010
Outspark - 2013
PAM Development (Take-Two) - 2008
Pandemic Australia (EA) - 2009
Pandemic LA (EA) - 2009
Paradigm Entertainment - 2008
Pi Studios - 2011
Pivotal Games (Take-Two) - 2008
PopCap Dublin - 2012
Propaganda Games (Disney) - 2011
Pseudo Interactive - 2008
Radical Entertainment - 2012
Rainbow Studios (THQ) - 2011
Razorworks - 2009
Reakktor Media - 2012
Realtime Worlds - 2010
Rebellion Derby - 2010
Red Octane - 2010
Redtribe - 2008
Rockstar Vancouver - 2012
Rockstar Vienna - 2006
Sandblast Games (THQ) - 2008
SEGA San Francisco - 2010
Sensory Sweep Studios - 2010
Seta - 2008
Shaba Games (Activision) - 2009
SideCar Studios - 2007
Sierra Online - 2008
Snapdragon Games - 2009
SOE Denver - 2011
SOE Seattle - 2011
SOE Tuscon - 2011
Sony Liverpool - 2012
Spellbound Entertainment - 2012
Stormfront Studios - 2008
Straylight Studios - 2009
Team Bondi - 2011
The Code Monkeys - 2011
Titan Studios - 2009
THQ Australia - 2009
THQ Digital Warrington - 2009
THQ San Diego - 2012
Transmission Games/IR Gurus - 2009
Ubisoft Brazil - 2010
Ubisoft Vancouver - 2012
Underground Development/Z-Axis (Activision) - 2010
Universomo (THQ) - 2009
Venom Games (Take Two) - 2008
Vicarious Visions California - 2007
Visceral Montreal - 2013
Vigil Games - 2013
Visceral Australia (EA) - 2011
Wizarbox - 2013
Wolfpack Studios - 2006
Yuke’s Company Of America - 2010
Zipper Interactive - 2012
Zoe Mode London - 2009
Zoonami - 2011
Zynga Boston - 2012
Zynga Japan - 2013
I decided to start in 2006, but some may argue that it's too early since the generation started in November 2005. When possible, I added the year every studio was closed and a link confirming the news. If you want to add a studio missing from the list, providing a link and the year of death would be appreciated. Gamasutra was my main source, because they were around in 2006 and they are reliable and credible.
Note: some studios were merged over the year, and I didn't include them. For example, The Collective and Shiny Entertainment became Double Helix in 2008. Another one: SouthPeak bought Gamecock. Recently, Artoon, Cavia and Feel Plus were absorbed into AQ Interactive. I guess we could argue in this thread whether or not these studios deserve to be in this list or not.
One last point: yes, this list is depressing, but I'm pretty sure the list of studios created from 2006-2012 is much longer than the one below.
38 Studios - 2012
3D Realms - 2009
4mm Games - 2012
7 Studios (Activision) - 2011
ACES Studio (Microsoft) - 2009
Action Forms - 2009
Artech Studios - 2011
Ascaron - 2009
Atomic Elbow - 2008
Backbone Vancouver
Beam Software/Melbourne House - 2010
BigBig (Sony) - 2012
Big Huge Games - 2012
Bizarre Creations (Activision) - 2010/2011
Black Hole Entertainment - 2012
Black Rock (Disney) - 2011
Blue Fang Games - 2011
Blue Tongue (THQ) - 2011
BottleRocket - 2009
Brash Entertainment - 2008
Budcat (Activision) - 2010
Carbonated Games - 2008
Castaway Entertainment - 2008
Cavia - 2010
Cheyenne Mountain - 2010
Cing - 2010
Clover Studios (Capcom) - 2006
Codemasters Guildford - 2011
Cohort Studios - 2011
Concrete Games - 2008
Dark Energy Digital - 2012
Deep Silver Vienna - 2010
DICE Canada - 2006
Digital Anvil - 2006
EA Chicago - 2007
EA Bright Light - 2011/2012
EA Japan - 2007
EA Victory Games - 2013
Eden Games - 2012
Eidos Manchester - 2009
Eidos Hungary - 2010
Empire Interactive - 2009
Ensemble Studios (Microsoft) - 2008
Étrange Libellules - 2012
Eurocom - 2012
Factor 5 - 2009
FASA (Microsoft) - 2007
Fizz Factor - 2009
Flagship Studios - 2008
Flight Plan - 2010
Frozen North Productions
Funcom Beijing - 2013
FuzzyEyes - 2009
Gaia
Gamelab - 2009
Game Republic - 2011
GRIN - 2009
Groove Games - 2010
Gutso Games
HB Studios Halifax - 2012
Helixe (THQ) - 2008
Hogrocket - 2012
Hudson Entertainment - 2011
Hudson Soft - 2012
Humannature Studio (Nexon Vancouver) - 2009
Ignition London - 2010
Ignition Florida - 2010
ImaginEngine - 2012
Impossible Studios - 2013
Incognito Entertainment (Sony) - 2009
Indie Built (Take-Two) - 2006
Iron Lore - 2008
Juice Games (THQ) - 2011
Junction Point - 2013
Kaos Studios (THQ) - 2011
Killaware - 2011
Killspace Entertainment - 2011
KMM Brisbane - 2011
Kuju Manila - 2009
Kuju Chemistry - 2009
Kush Games - 2008
Locomotive Games (THQ) - 2010
Loose Cannon Studios - 2010
Luxoflux - 2010
Mass Media (THQ) - 2008
Microsoft Game Studios Vancouver - 2012
Monte Cristo - 2010
Monumental Games - 2012
Midway Austin - 2009
Midway Newcastle - 2009
MTV Games - 2011
Multiverse - 2012
NetDevil - 2011
Ninja Studio - 2009
Nihon Telenet - 2007
Outerlight - 2010
Outspark - 2013
PAM Development (Take-Two) - 2008
Pandemic Australia (EA) - 2009
Pandemic LA (EA) - 2009
Paradigm Entertainment - 2008
Pi Studios - 2011
Pivotal Games (Take-Two) - 2008
PopCap Dublin - 2012
Propaganda Games (Disney) - 2011
Pseudo Interactive - 2008
Radical Entertainment - 2012
Rainbow Studios (THQ) - 2011
Razorworks - 2009
Reakktor Media - 2012
Realtime Worlds - 2010
Rebellion Derby - 2010
Red Octane - 2010
Redtribe - 2008
Rockstar Vancouver - 2012
Rockstar Vienna - 2006
Sandblast Games (THQ) - 2008
SEGA San Francisco - 2010
Sensory Sweep Studios - 2010
Seta - 2008
Shaba Games (Activision) - 2009
SideCar Studios - 2007
Sierra Online - 2008
Snapdragon Games - 2009
SOE Denver - 2011
SOE Seattle - 2011
SOE Tuscon - 2011
Sony Liverpool - 2012
Spellbound Entertainment - 2012
Stormfront Studios - 2008
Straylight Studios - 2009
Team Bondi - 2011
The Code Monkeys - 2011
Titan Studios - 2009
THQ Australia - 2009
THQ Digital Warrington - 2009
THQ San Diego - 2012
Transmission Games/IR Gurus - 2009
Ubisoft Brazil - 2010
Ubisoft Vancouver - 2012
Underground Development/Z-Axis (Activision) - 2010
Universomo (THQ) - 2009
Venom Games (Take Two) - 2008
Vicarious Visions California - 2007
Visceral Montreal - 2013
Vigil Games - 2013
Visceral Australia (EA) - 2011
Wizarbox - 2013
Wolfpack Studios - 2006
Yuke’s Company Of America - 2010
Zipper Interactive - 2012
Zoe Mode London - 2009
Zoonami - 2011
Zynga Boston - 2012
Zynga Japan - 2013