Question: What 1997 computer game had a sequel published by Activision in 1999 for Microsoft Windows?

Context paragraphs:
Heavy Gear II: Heavy Gear II is a mecha based first-person shooter video game.  Set in Dream Pod 9's Heavy Gear universe, the game was developed and published by Activision in 1999 for Microsoft Windows, it was ported to Linux in 2000 by Loki Software.  It is a sequel to the 1997 video game "Heavy Gear".

The Sims 3: The Sims 3 is the third major title in the life simulation video game developed by The Sims Studio (Maxis) and published by Electronic Arts.  It is the sequel to the best-selling computer game, "The Sims 2".  It was first announced that it was in development for PlayStation 3 and Wii in November 2006, and later announced for OS X and Microsoft Windows.  It was first released on June 2, 2009 simultaneously for OS X and Microsoft Windows – both versions on the same disc.  Smartphone versions were also released on June 2, 2009.  Consoles versions were released for PlayStation 3, Xbox 360, and Nintendo DS in October 2010 and a month later for the Wii.  The Windows Phone version was made available on the Windows Phone Store on October 15, 2010.  A Nintendo 3DS version, released on March 27, 2011, was one of its launch titles.

Microsoft Hearts: Hearts, also known as Microsoft Hearts and previously named The Microsoft Hearts Network, is a computer game included with Microsoft Windows, based on a card game with the same name.  It was first introduced in Windows 3.1 in 1992, and has since been included in every version of Windows up to Windows 7.

Microsoft Flight Simulator X: Microsoft Flight Simulator X (abbreviated to FSX) is a 2006 flight simulation computer game originally developed for, and published by Microsoft Game Studios for Microsoft Windows.  It is the sequel to "Microsoft Flight Simulator 2004" and the tenth and most current installment of the "Microsoft Flight Simulator" series, which was first released in 1982.  It is built on an upgraded graphics rendering engine, showcasing DirectX 10 features and was marketed by Microsoft as the most important technological milestone in the series to date.  "FSX" is the first version in the series to be released on DVD media.  As of 2017, this is the most recent game of the flight simulator series.

James Bond 007: Blood Stone: James Bond 007: Blood Stone is a third-person shooter video game, developed by Bizarre Creations and published by Activision for the Microsoft Windows, Nintendo DS, PlayStation 3 and Xbox 360 platforms.  It is the 24th game in the James Bond series although it is not a direct sequel to any game; it is the first game since "" to have an original story.  The game was confirmed by Activision on July 16, 2010.  The game was released on November 2, 2010 in North America and released on November 5, 2010 in Europe.  Activision's "GoldenEye 007" (2010) was released on the same day respectively in each region.  "Blood Stone" features the voices and likenesses of Daniel Craig, Judi Dench, and Joss Stone.  "007: Blood Stone" was the final game developed by Bizarre Creations before it closed its doors on February 18, 2011.

Microsoft Minesweeper: Microsoft Minesweeper (formerly Minesweeper) is a minesweeper computer game created by Curt Johnson, originally for OS/2, and ported to Microsoft Windows by Robert Donner, both Microsoft employees at the time.  First officially released as part of the Microsoft Entertainment Pack 1 in 1990, it was included in the standard install of Windows 3.1 in 1992, replacing Reversi from Windows 3.0.  Microsoft Minesweeper has been included without a major change in all subsequent Windows releases until Windows Vista, at which time an updated version by Oberon Media replaced it.  In Windows 8 and later the game is not included, but Microsoft Studios published an updated version of it, developed by Arkadium, on Windows Store.

Dark Reign: The Future of War: Dark Reign: The Future of War is a real-time strategy computer game for Microsoft Windows, developed by Auran and published by Activision in 1997.  The game consists of a large single-player campaign but also supports multiplayer online games.  A fully functional mission construction kit was included with the game, that allowed players to create new maps for multiplayer game and even create entire new missions and campaigns.

Mat Hoffman's Pro BMX: Mat Hoffman's Pro BMX is a BMX video game endorsed by Mat Hoffman and published by Activision.  The first game to launch under Activision's short-lived "Activision O2" label, it served as a spin-off to the "Tony Hawk's" series and competed directly with "Dave Mirra Freestyle BMX".  Despite a planned release in fall of 2000, the game was released on May 14, 2001 for the PlayStation and Game Boy Color.  Ports were made for the Dreamcast, Microsoft Windows and Game Boy Advance.  A sequel was released the following year.

Heavy Gear (video game): Heavy Gear is a 1997 computer game based on the "Heavy Gear" role-playing game.  A sequel, "Heavy Gear II", was released in 1999.

Brütal Legend: Brütal Legend is an action-adventure video game with real-time strategy game elements created by Double Fine Productions and published by Electronic Arts for the PlayStation 3 and Xbox 360.  The game was released during October 2009 in North America, Europe, and Australia.  Though "Brütal Legend" was originally to be published by Vivendi Games prior to its merger with Activision, Activision dropped the game from its portfolio after the merger.  It was later picked up by Electronic Arts, though Activision and Double Fine brought counter-lawsuits against each other over publishing issues.  The issues were settled out of court.  Later, Double Fine announced a port of the game for Microsoft Windows via Steam, which was released in February 2013.  Mac OS X and Linux versions of the game were made available as part of the Humble Bundle in May 2013.  A physical collector's edition for Windows, Mac OS X, and Linux was released by IndieBox in October 2014.

Supporting paragraphs: Heavy Gear II Heavy Gear (video game)
Answer: Heavy Gear