System 3 (company)
| Formerly | 
 | 
|---|---|
| Company type | Public | 
| Industry | Video games | 
| Founded | 1982 | 
| Founders | 
 | 
| Headquarters | London, United Kingdom | 
| Key people | 
 | 
| Products | Last Ninja series International Karate series Constructor Putty | 
| Website | http://www.system3.com/ | 
System 3 Software Limited (known as System 3 Software Ltd. until 1991 and Studio 3 Interactive Entertainment Ltd. from 1999 to 2003) is a British independent video game developer and publisher founded in 1982 by Mark Cale.
They created games such as The Last Ninja, Myth: History in the Making, International Karate, Putty, Constructor and its 1999 sequel Street Wars: Constructor Underworld (also known as Mob Rule) as well as dozens of other games.
Studio 3 was the internal development arm of System 3.