Institutions

RockStar Games:
Founded in 1998 with HQs in New York, USA

Owner Company: Take-Two Interactive

Best Games From Rockstar:
5. Max payne 2
4. Red Dead Redemption
3. GTA San Andreas
2. GTA IV
1. GTA V

Interesting Facts: In October 2011, Rockstar creative vice president Dan Houser said that they are intentionally avoiding the 1st person shooter genre. He said this was because "It's in Rockstar's DNA to avoid what other companies are doing."

EA (Electronic Arts)
Founded by Trip Hawkins in 1982 with HQs in California, USA

Best Games From EA:
5. Medal of Honour: Frontline
4. Dead Space
3. NFS: Most Wanted
2. FIFA 13
1. Battlefield 4

Interesting Fact: EA has become so big that publishing happens from inside the same company, this means that they do not need to pay another company for publishing therefore keeping the profits.

Zynga

Founded by Mark Pincus, Eric Schiermeyer, Michael Luxton, Justin Waldron, Kyle Stewart, Scott Dale and Steve Schoettler in July 2007 with HQs in San Francisco, USA

Best Games from Zynga:
5. Mafia Wars
4. Street Racing
3. CityVille
2. FarmVille
1. Hidden Shadows
Interesting Fact:
Zynga was named after the bulldog called Zinga of Mark Pincus

Nintendo
Founded by Fusajiro Yamouchi in Kyoto, Japan September 1889

Best Games:
5. Star Wars
4. Wii Sports
3. New super Mario bros.
2. Wii Party
1. Mario Kart

Interesting Fact: The name Nintendo can be roughly transated from Japanese to English as " Leave luck to heaven". Also, Nintendo was originally founded as a card company...

Sony Computer Entertainment Inc

Parent company Sony Corporation and founded in 1993

Best games on SCEI:
5. FIFA 14
4. AC4
3. Battle Field 4
2. Killzone: ShadowFall
1. Infamous: Second Son

Interesting Facts: The President, and group CEO of SCE is currently Andrew House, replacing Kaz Hirai who himself had replaced longtime CEO Ken Kutaragi also known as "The father of playstation"