Developers and Publishers

Rockstar Games
Background: Founded in 1998 in New York, United States.
Founders: Dan Houser, Terry Donovan, Gary Foreman, Jamie King, Sam Houser
CEO: Terry Donovan 
Most Successful Games: Grand Theft Auto, Midnight Club, Max Payne, Smuggler's Run, Manhunt, and Red Dead Revolver
Interesting fact: They have 8 studios and over 900 employees.

EA (Electronic Arts)
Background: Founded May 28, 1982 in California, United States.
Owner/Founder: Trip Hawkins
CEO: Andrew Wilson
Most Successful Games:Battlefield series, Burnout series, The sims series, Need for Speed series, FIFA series
Interesting fact: They have 9,370 employees

Zynga
Background: Founded in July, 2007 in San Fransisco, United States.
Founders: Eric Schiermeyer, Mark Pincus
CEO: Don Mattrick
Most Successful Games: Farmville 2, Cityville, Castleville, Chefville
Interesting fact: They have 2,034 employees

Nintendo
Background: Founded September 23, 1889 in Kyoto, Japan.
Owner/Founder: Fusajiro Yamauchi
CEO: Satoru Iwata
Most Successful Games: Nintendo DS family, Wii, Nintendo 3DS family, Wii U
Interesting fact: They have 5,195 internal employees and 1,988 external employees

Sony Computer Entertainment
Background: Founded November 16, 1993 in Tokyo, Japan
Founders: Ken Kutaragi, Norio Ohga
CEO: Andrew House
Most Successful Games: PlayStation, PlayStation 2, PlayStation 3, PlayStation 4, PlayStation Portable, PlayStation Vita
Interesting fact: They have 1,300 employees