platform special forces 
The ___MASK87___ is a line of home computers from Atari Corporation and the successor to the Atari 8 - bit family . The initial ST model , the 520ST , saw limited release in the spring of 1985 and was widely available in July . The ___MASK87___ is the first personal computer to come with a bit - mapped color GUI , using a version of Digital Research ' s GEM released in February 1985 . The 1040ST , released in 1986 , is the first personal computer to ship with a megabyte of RAM in the base configuration and also the first with a cost - per - kilobyte of less than US $ 1 . The ___MASK65___ is a family of personal computers sold by Commodore in the 1980s and 1990s . Based on the ___MASK50___ of microprocessors , the machine has a custom chipset with graphics and sound capabilities that were unprecedented for the price , and a pre - emptive multitasking operating system called AmigaOS . The ___MASK65___ provided a significant upgrade from earlier 8 - bit home computers , including Commodore ' s own C64 . The ___MASK21___ is an 8 - bit personal ___MASK99___ released in the United Kingdom in 1982 by Sinclair Research Ltd . It was manufactured in Dundee , Scotland , in the now closed Timex factory . A video game publisher is a company that publishes video games that they have either developed internally or have had developed by a video game developer . As with book publishers or publishers of ___MASK71___ movies , video game publishers are responsible for their product ' s manufacturing and marketing , including market research and all aspects of advertising . The ___MASK10___ ( short for " Colour ___MASK24___ ") is a series of 8 - bit home computers produced by Amstrad between 1984 and 1990 . It was designed to compete in the mid - 1980s ___MASK99___ market dominated by the ___MASK1___ and the Sinclair ZX Spectrum , where it successfully established itself primarily in the United Kingdom , France , Spain , and the German - speaking parts of Europe . The ___MASK1___ , also known as the C64 , C - 64 , C = 64 , or occasionally CBM 64 or VIC - 64 in Sweden , is an 8 - bit home computer introduced in January 1982 by ___MASK5___ . It is listed in the Guinness World Records as the highest - selling single computer model of all time , with independent estimates placing the number sold between 10 and 17 million units . Volume production started in early 1982 , marketing in August for . Preceded by the Commodore VIC - 20 and Commodore PET , the C64 took its name from its of RAM . It had superior sound and graphical specifications compared to other earlier systems such as the Apple II and Atari 800 , with multi - color sprites and a more advanced sound processor . MicroProse was an American video game publisher and developer founded by " Wild " Bill Stealey and Sid Meier in 1982 as MicroProse Software Inc . It developed and published numerous games , many of which are regarded as groundbreaking , classics and cult titles , including starting the " Civilization " and " X - COM " series . Most of their internally developed titles were vehicle simulation and strategy games . Special Forces is a video game released in 1991 by MicroProse . In the game , a team of special operatives are to infiltrate enemy territory to complete various objectives . The game is a sequel to Airborne Ranger . MS - ___MASK85___ (; acronym for " Microsoft Disk Operating System ") is a discontinued operating system for x86 - based personal computers mostly developed by Microsoft . It was the most commonly used member of the ___MASK85___ family of operating systems , and was the main operating system for IBM PC compatible personal computers during the 1980s and the early 1990s , when it was gradually superseded by operating systems offering a graphical user interface ( GUI ), in various generations of the graphical Microsoft Windows operating system by Microsoft Corporation . Airborne Ranger is a video game developed and released by MicroProse in 1987 for the ___MASK10___ , ___MASK1___ , ZX Spectrum , and MS - ___MASK85___ . It is an action game in which a sole U . S . Army Ranger is sent to infiltrate the enemy territory to complete various objectives . Amiga and Atari ST versions were released few years later and were a wholly independent development effort and different from gameplay standpoint .