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, ', International Karate, Putty, Constructor and its 1999 sequel ' (also known as Mob Rule) as well as dozens of other games.
Studio 3 was the internal development arm of System 3.