Question: Which game studio developed the video game in which the fictional substance Tiberium  is used to purchase units and buildings?
Context: Ghostbusters: The Video Game is a 2009 action-adventure game based on the "Ghostbusters" media franchise.  Terminal Reality developed the Windows, PlayStation 3, and Xbox 360 versions, while Red Fly Studio developed the PlayStation 2, PlayStation Portable, and Wii versions, and Zen Studios developed the Nintendo DS version.  The game was released after several delays in development and multiple publisher changes.  In North America, all versions of the game were published by Atari, while publishing in Europe for the PlayStation 2, PlayStation Portable and PlayStation 3 versions was handled by Sony Computer Entertainment. Black Rock Studio was a video game developer based in Brighton, England.  The studio was founded by Tony Beckwith in 1998 as Pixel Planet.  It was then acquired by the Climax Group in 1999 and was renamed Climax Brighton.  In 2004, it became Climax Racing, as the Climax Group rebranded its studios.  On 28 September 2006, it was acquired by Buena Vista Games and was eventually renamed Black Rock Studio in 2007.  The last game the studio developed for the Climax Group was "MotoGP '07", which was completed after its acquisition by Buena Vista Games.  The name is derived from a district in Brighton.  In early 2011, the company faced lay-offs and was forced to abandon sequels for "Pure" and "Split/Second".  Despite good reviews for both games, Disney Interactive Studios turned down both sequels to focus on freemium content. Benjamin Richard "Yahtzee" Croshaw (born 24 May 1983) is a British comedic writer, video game journalist, humorist, author, and video game developer.  He is best known for his acerbic video game review series, "Zero Punctuation", for "The Escapist".  Before this, Croshaw gained attention in the Adventure Game Studio community for his video game production. Clover Studio (Japanese: クローバースタジオ株式会社 , Hepburn: Kurōbā sutajio kabushiki gaisha ) was an independent Japanese video game development studio funded by Capcom.  The studio developed the PlayStation 2 port of "Viewtiful Joe", both versions of "Viewtiful Joe 2" for the Nintendo GameCube and PlayStation 2, and the PS2 titles "Ōkami" and "God Hand".  The name "clover" is an abbreviation of "creativity lover" as well as the Japanese syllables mi ("three") and ba ("leaf") coming from the names of Shinji Mikami and Clover's Atsushi Inaba. Command & Conquer 3: Tiberium Wars is a military science fiction real-time strategy video game developed and published by Electronic Arts for the Windows, Mac OS X and Xbox 360 platforms, and released internationally in March 2007.  The direct sequel to 1999's "" by Westwood Studios which was taken over and liquidated by EA in 2003, "Tiberium Wars" returns the "Command & Conquer" series to its roots in the of the franchise, again featuring the factions of the Global Defense Initiative and the Brotherhood of Nod, and also introducing a new extraterrestrial faction known as the Scrin.  An expansion pack to "Tiberium Wars", titled "", was released on March 24, 2008. Command & Conquer, sometimes known as Command & Conquer: Tiberian Dawn, is a 1995 real-time strategy video game developed by Westwood Studios and published by Virgin Interactive.  Set in an alternate history of modern day, the game tells the story of a world war between two globalized factions: the Global Defense Initiative of the United Nations and a cult-like militant organization called the Brotherhood of Nod, led by the mysterious Kane.  The groups compete for control of Tiberium, a mysterious substance that slowly spreads across the world. Tiberium, known as Ichor to the Scrin, is a fictional substance that is central to the plot of much of the "Command & Conquer" series of real-time strategy computer games. Within each title set in the ("Tiberian Dawn", "", "", "", "", and their expansion packs), the Tiberium crystals represent both the tools and spoils of war and are used by players to purchase new units and buildings, with each of the series' factions either directly or indirectly battling for control over the crystals.  Tiberium has extraterrestrial origins and comes in a variety of forms, mostly the common green crystal but also the more rare blue crystals, the extremely rare red crystals, and in "veins".  It was also demonstrated in a liquid form by the time of Tiberium Wars.  Parts of the chemical composition of tiberium remain unknown. Chimera Entertainment is a German PC, mobile and video game development company and the biggest studio within the developer family of remote control productions, which hosts Germany’s biggest developer network.  As one of Germany´s leading development studio for entertainment software Chimera employs over 35 people in Munich, Germany.  The award winning studio developed more than 15 games on five platforms including Angry Birds Epic,John Woo´s Bloodstroke and Warstory – Europe in Flames.  Chimera Entertainment worked with partners like Rovio, DeNA, Audi, Bigpoint and Koch Media. Game Studio Corporation Ltd. (株式会社ゲームスタジオ ) is a video game production company headquartered in Shinagawa, Tokyo, Japan.  It was founded on August 14, 1985 by former Namco employee Masanobu Endō, who continued to develop projects for Namco through his company.  The company later made a subsidiary company called Mobile & Game Studio ( ) , while the goodwill was transferred. Command & Conquer (abbreviated as C&C or CnC) is a real-time strategy (RTS) video game franchise, first developed by Westwood Studios.  The first game was one of the earliest of the RTS genre, itself based on Westwood Studios' landmark strategy game "Dune II" and introducing trademarks followed in the rest of the series.  This includes full-motion video cutscenes with a notable ensemble cast to progress the story, as opposed to digitally in-game rendered cutscenes.  Westwood Studios was taken over by Electronic Arts in 1998 and eventually closed down in 2003.  The studio and some of its members were absorbed into EA Los Angeles, which continued development on the series.
Answer: Westwood Studios