Please answer the following question: Information:  - Big Huge Games is a video game developer located in Timonium, Maryland. The company was founded in February 2000 by four veteran game industry developers: Tim Train, David Inscore, Jason Coleman and Brian Reynolds (lead designer of "Alpha Centauri", et al.). Their first game, "Rise of Nations", was a critical and commercial hit. The original studio became defunct in May 2012, but the name "Big Huge Games" was later reacquired by Reynolds and Train for their new venture (previously known as SecretNewCo). The revived studio released the mobile game "DomiNations" on Android and iOS in April 2015.  - 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).   - 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.  - Gearbox Software, LLC is an American video game development company based in Frisco, Texas. It was established in 1999 by developers from companies such as 3D Realms and Bethesda Softworks, with one of the founders, Randy Pitchford, as CEO. The company initially created expansions for the Valve Corporation game "Half-Life", then ported that game and others to console platforms. In 2005 Gearbox launched its first independent set of games, "Brothers in Arms", on console and mobile devices. It became their flagship franchise and spun off a comic book series, television documentary, books, and action figures. Their second original game series "Borderlands" was released in 2009, and by 2015 had sold over 26 million copies. The company also owns the intellectual property of "Duke Nukem" and "Homeworld".  - The is a home video game console released by Nintendo in Japan on September 14, 2001; in North America on November 18, 2001; in Europe on May 3, 2002; and in Australia on May 17, 2002. The sixth-generation console is the successor to the Nintendo 64 and competed with Sony Computer Entertainment's PlayStation 2 and Microsoft's Xbox.  - Age of Empires III is a real-time strategy video game developed by Microsoft Corporation's Ensemble Studios and published by Microsoft Game Studios. The Mac version was ported over and developed and published by Destineer's MacSoft Games. The PC version was released on October 18, 2005 in North America and November 4, 2005 in Europe, while the Mac version was released on November 21, 2006 in North America and September 29, 2006 in Europe. An N-Gage version of the game developed by Glu Mobile was released on April 28, 2009. It is the third game of the "Age of Empires" series and the sequel to "".  - Duke Nukem is a video game series named for its protagonist Duke Nukem. Created originally by the company Apogee Software Ltd. (now 3D Realms) as a series of video games for IBM-compatible personal computers, the series expanded to games released for various consoles by third-party developers. During 2010 the rights of the series were acquired by the company Gearbox Software, who completed the development of "Duke Nukem Forever" and released it on 10 June 2011 in Europe and Australia and on 14 June 2011 in North America.  - Bethesda Softworks LLC is an American video game publisher based in Rockville, Maryland. The company was founded by Christopher Weaver in 1986 in Bethesda, Maryland as a division of Media Technology Limited, and nowadays is a wholly owned subsidiary of ZeniMax Media. Originally a video game developer itself, Bethesda Softworks now acts as the publisher for their in-house development team, Bethesda Game Studios, and ZeniMax Media's subsidiaries, ZeniMax Online Studios, id Software, Arkane Studios, MachineGames, Tango Gameworks and BattleCry Studios.  - The is a home video game console released by Sega on November 27, 1998 in Japan, September 9, 1999 in North America, and October 14, 1999 in Europe. It was the first in the sixth generation of video game consoles, preceding Sony's PlayStation 2, Nintendo's GameCube and Microsoft's Xbox. The Dreamcast was Sega's final home console, marking the end of the company's 18 years in the console market.  - Half - Life : Blue Shift is an expansion pack for Valve Software 's science fiction first - person shooter video game Half - Life . The game was developed by Gearbox Software with Valve Corporation and published by Sierra Entertainment on June 12 , 2001 ( it was originally set for release in Spring ) . Blue Shift is the second expansion for Half - Life , originally intended as part of a Dreamcast version of the original game . Although the Dreamcast port was later cancelled , the PC version continued development and was released as a standalone product . The game was released on Steam on August 24 , 2005 . As with Gearbox 's previous expansion pack Opposing Force , Blue Shift returns to the setting and events of the original game , but portrays the story through the eyes of another person . The protagonist in Blue Shift is a security guard , Barney Calhoun , employed by the Black Mesa Research Facility . After a scientific mishap causes Black Mesa to be invaded by aliens , Calhoun must fight his way to safety . The game received mostly positive reception . Many reviewers were critical of the short length of the game and the lack of new content , although the inclusion of a High Definition pack that upgraded the models and textures in both Blue Shift and the preceding Half - Life games was praised .  - Abandoning previous ventures in favor of toys in the 1960s, Nintendo then developed into a video game company in the 1970s, ultimately becoming one of the most influential in the industry and Japan's third most-valuable company with a market value of over $85 billion. From 1992 until 2016, Nintendo was also the majority shareholder of Major League Baseball's Seattle Mariners.  - 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.  - The PlayStation 2 (abbreviated as PS2) is a home video game console that was developed by Sony Computer Entertainment. It is the successor to the PlayStation, and is the second installment in the PlayStation lineup of consoles. It was released on March 4, 2000 in Japan, October 26, 2000 in North America, November 24, 2000 in Europe, and November 17, 2000 in Australia. It competed with Sega's Dreamcast, Microsoft's Xbox, and Nintendo's GameCube in the sixth generation of video game consoles.  - Activision Blizzard, Inc. is an American interactive gaming and entertainment company. Headquartered in Santa Monica, California and founded in 2008 through the merger of Vivendi Games and Activision, the company is traded on the NASDAQ stock exchange under the ticker symbol , and since 2015 has been one of the stocks that make up the S&P 500. Activision Blizzard currently includes five business units: Activision, Blizzard Entertainment, Major League Gaming, Activision Blizzard Studios, and King Digital Entertainment.  - Ensemble Studios was a video game developer initially established in 1995 as an independent company by Tony Goodman, Rick Goodman and John Boog-Scott, but was acquired by Microsoft in 2001 and operated as an internal studio until 2009, when it was officially disbanded. Ensemble developed many real-time strategy games, including the "Age of Empires" game series, "Age of Mythology", and "Halo Wars". In addition to game development, Ensemble Studios also made the Genie Game Engine used in "Age of Empires", "", and "". The studio sold 20 million games and was worth an estimated $500 million.  - An expansion pack, expansion set, supplement, or simply expansion is an addition to an existing role-playing game, tabletop game or video game. These add-ons usually add new game areas, weapons, objects, characters and/or an extended storyline to complete an already released game. While board game expansions are typically designed by the original creator, video game developers sometimes contract out development of the expansion pack to a third-party company, (see "" for "Diablo"), it may choose to develop the expansion itself or it may do both (Ensemble Studios developed the real-time strategy game Age of Empires III and the first expansion called itself, but contracted Big Huge Games for the second expansion pack, the Asian Dynasties). Board games and tabletop RPGs may have been marketing expansions since the 1970s, and video games have been releasing expansion packs since the 1980s, early examples being the "Dragon Slayer" games "" and "Sorcerian".  - Homeworld is a real-time strategy video game developed by Relic Entertainment and published by Sierra Studios on September 28, 1999 for Microsoft Windows. Set in space, the science fiction game follows the Kushan exiles of the planet Kharak after their home planet is destroyed by the Taiidan Empire in retaliation for developing hyperspace jump technology. The survivors journey with their spacecraft-constructing mothership to reclaim their ancient homeworld of Hiigara from the Taiidan, encountering a variety of pirates, mercenaries, traders, and rebels along the way. In each of the game's levels, the player gathers resources, builds a fleet, and uses it to destroy enemy ships and accomplish mission objectives. The player's fleet carries over between levels, and can travel in a fully three-dimensional space within each level rather than being limited to a two-dimensional plane.    Given the paragraphs above, decide what entity has the relation 'designer' with 'randy pitchford'.
A:
half-life: blue shift