Information: - Ground Control is a real - time tactics video game developed by Massive Entertainment and published by Sierra Entertainment for the PC Windows in 2000 . - Massive Entertainment AB is a Swedish video game developer based in Malmo, Sweden. The company has been fully owned by Ubisoft since 2008. The studio is known for "Ground Control", "World in Conflict", and their latest title "Tom Clancy's The Division". - Activision Publishing, Inc., also known as Activision, is an American video game publisher. It was founded on October 1, 1979 and was the world's first independent developer and distributor of video games for gaming consoles. Its first products were cartridges for the Atari 2600 video console system published from July 1980 for the US market and from August 1981 for the international market (UK). - Roberta Williams (born February 16, 1953) is an American video game designer, writer, and a co-founder of Sierra On-Line (later known as Sierra Entertainment), who developed her first game while living in Simi Valley, California. She is most famous for her pioneering work in the field of graphic adventure games with titles such as "Mystery House", the "King's Quest" series, and "Phantasmagoria". She is married to Ken Williams and retired from her career in 1999. Roberta Williams is one of the most influential PC game designers of the 1980s and 1990s, and has been credited with creating the graphic adventure genre. - Sierra Entertainment (previously Sierra On-Line, commonly referred to as Sierra) is an American publisher founded in 1979 as On-Line Systems by Ken and Roberta Williams. Based in Oakhurst, California and later in Fresno, California, the division is now owned by Activision, a subsidiary of Activision Blizzard. - World in Conflict is a 2007 real-time tactical video game developed by the Swedish video game company Massive Entertainment and published by Sierra Entertainment for Microsoft Windows. The game was released in September 2007 and an expansion pack was released in March 2009 under the name "". Given the information above, choose from the list below the object entity that exhibits the relation 'platform' with the subject 'ground control '. Choices: - atari - atari 2600 - microsoft windows - pc
The answer to this question is:
microsoft windows