Question: Where is the headquarters located for the company that had Mud Duck Productions as a subsidiary?

Context paragraphs:
Malice (2004 video game): Malice is a platform game for the Xbox and PlayStation 2 developed by Argonaut Games and published by Mud Duck Productions in North America and Evolved Games in Europe.  The Xbox version is not compatible with Xbox 360.  The game was originally supposed to be a title for the Sony PlayStation.  However it was ported and management aimed to release it in late 2001 as an Xbox launch title with band members from No Doubt doing various voice-overs and singer Gwen Stefani doing the voice for Malice.  After a lengthy delay, cancellation, a change in publishers and an eventual revival, the game was finally released in 2004 and was met with mediocre reviews.  This was also the last game Argonaut ever made, due to the company going out of business two months after the Xbox version came out in Europe.

Mud Duck Productions: Mud Duck Productions was a budget range video game publisher established in 2002 as a subsidiary of ZeniMax Media.  It was closed again in 2007.

Natural Balance Pet Foods: Dick Van Patten's Natural Balance Pet Foods is an American pet food manufacturer with its headquarters located in Burbank, Los Angeles, California.  Established in 1989 by actor Dick Van Patten, the company markets itself as "Food For a Lifetime" and promotes itself as having "the finest food you can buy for your pet."  A subsidiary of Big Heart Pet Brands, it is currently owned by the J.M. Smucker Company.

Gerald D. Hines: Gerald D. Hines (born 1925) is the founder and chairman of Hines, a privately held real estate firm with its U.S. headquarters located in Houston, Texas, and its European headquarters located in London.  As of 2016, Gerald Hines' net worth equaled USD $1.3 billion.

TVS Group: TVS Group is an Indian diversified industrial conglomerate with its principal headquarters located in Madurai and presence across the Globe.  Almost all holdings of the group are private.  The largest and most visible subsidiary is TVS Motor Company, the third-largest two-wheeler manufacturers in India.  TVS Group, with group revenue of more than US$6 billion, is an automotive conglomerate company, specialized in manufacturing of two-wheeler, three-wheeler, auto-electricals components, high tensile fasteners, die casting products,dealership business, brakes, wheels, tyres, axles, seating systems, fuel injection components, electronic and electrical components and many more.

Disney Cruise Line: Disney Cruise Line is a cruise line operation that is a subsidiary of The Walt Disney Company.  The company was incorporated in 1996 as Magical Cruise Company Limited and is domiciled in London, England, with their operational headquarters located in Celebration, Florida.  The president, Karl Holz, will be replaced by Anthony Connelly in October 2017.

Transportistas Unidos Mexicanos: Transportistas Unidos Mexicanos otherwise known as TUM or TUM Transportistas, is a Mexican Trucking Company based out of Mexico City founded in 1938.  TUM operates 18 terminals all over Mexico, with its corporate headquarters located in Mexico City Mexico, and its international headquarters located across from the U.S.' busiest port of entry in Nuevo Laredo, Tamaulipas.  TUM carries a fleet of over 1,800 Trucks, 2,500 trailers, and 1,800 drivers making it the largest trucking company in Mexico.

ZeniMax Media: ZeniMax Media Inc. is an American media company.  The company is known for owning Arkane Studios (developer of "Dishonored" and "Prey"), BattleCry Studios (developer of "BattleCry"), id Software (developer of the "Doom" and "Quake" series, and "Rage"), MachineGames (developer of ""), Tango Gameworks (developer of "The Evil Within"), Bethesda Softworks with its Bethesda Game Studios (developer of "The Elder Scrolls" and "Fallout" series) and ZeniMax Online Studios (developer of "The Elder Scrolls Online").  ZeniMax is headquartered in Rockville, Maryland, with offices in Asia / Asia Pacific, Australia and Europe (Germany, France, Benelux).

Baldies: Baldies is a real time strategy video game for the Atari Jaguar CD, MS-DOS, Microsoft Windows, the PlayStation, Amiga and (under the title "Baldy Land") the Sega Saturn and Macintosh.  It was initially released for the Jaguar CD in 1995, followed by the PC version, which was released November 28, 1996.  It was produced by Creative Edge Software, with the Jaguar CD version published by Atari, the PC version published by Panasonic Interactive Media, and the Saturn version published by Banpresto.  The PlayStation version was released in 2003 by Mud Duck Productions.

Tickled Pink: Tickled Pink (full title "Inside TV Land: Tickled Pink") was an hour-long television special which aired multiple times during July, 2006, chronicled television shows that homosexuals have identified with over the years.  The show featured such entertainers as Richard Andreoli, Kelsey Grammer, Sandra Bernhard, Diahann Carroll, Susan Saint James, Bruce Vilanch, Marc Cherry, Lynda Carter, Bob Mackie, Jean Smart, Jason Stuart, Frank DeCaro, Barbara Eden, Mike Gray, Carson Kressley, Rue McClanahan, Judy Gold, Thom Filicia, and Mario Cantone.  "Tickled Pink" was produced for TV Land by Linda Ellerbee’s Lucky Duck Productions.

Supporting paragraphs: Mud Duck Productions ZeniMax Media
Answer: Rockville, Maryland