Question: What video game published by Sierra Entertainment includes an antagonist figure who's mystery is the core of the series? 

full_context: Document 1: F.E.A.R.: F.E.A.R. First Encounter Assault Recon is a survival horror first-person shooter video game developed by Monolith Productions and published by Sierra Entertainment. It was released on October 17, 2005, for Microsoft Windows, and ported by Day 1 Studios to the Xbox 360 and PlayStation 3. TimeGate Studios has released two expansion packs, "F.E.A.R. Extraction Point" in October 2006, and "F.E.A.R. Perseus Mandate" in November 2007. A direct sequel titled "", was released in February 2009, and a second sequel, "F.3.A.R.", was released in June 2011, though it was developed by Day 1 Studios (now known as Wargaming Chicago-Baltimore), not by Monolith Productions.
Document 2: Far Cry: Far Cry is a franchise of first-person shooter video games, all which have been published by Ubisoft. The first game, "Far Cry", was developed by Crytek to premiere their new CryEngine software, and released in March 2004. Subsequently, Ubisoft obtained the full rights to the franchise and the bulk of the development is handled by Ubisoft Montreal with assistance from other Ubisoft satellite studios. The following games in the series have used a Ubisoft-modified version of the CryEngine, the Dunia Engine, allowing for open world gameplay. To date, there have been four main games in the series, with a fifth one announced for a 2018 release, along with two standalone expansions; the first game, initially developed for Microsoft Windows, also saw a number of ports to video game consoles.
Document 3: BioShock (series): BioShock is a first-person shooter video game series developed by Irrational Games—the first under the name 2K Boston/2K Australia—and designed by Ken Levine. The first game in the series was released for the Windows operating system and Xbox 360 video game console on August 21, 2007 in North America, and three days later (August 24) in Europe and Australia. A PlayStation 3 version of the game, which was developed by 2K Marin, was released internationally on October 17, 2008 and in North America on October 21, 2008 with some additional features. The game was also released for the Mac OS X operating system on October 7, 2009. A version of the game for mobile platforms has also been developed by IG Fun. A sequel, "BioShock 2", was released on February 9, 2010. On August 12, 2010, Irrational Games unveiled a trailer for a new game titled "BioShock Infinite", released on March 26, 2013. With the release of "BioShock Infinite" selling over 11 million copies as of May 2015, the three games combined have more than 25 million copies sold.
Document 4: Persona (series): Persona, also known as Shin Megami Tensei: Persona, is a video game franchise developed and primarily published by Atlus. Focusing around a series of role-playing video games, "Persona" is a spin-off from Atlus' "Megami Tensei" franchise, and was originally based on the high school setting of "Shin Megami Tensei If...". The first entry in the series, "", was released in 1996. There have since been five further main titles, with the latest—"Persona 5"—being released in 2016 in Japan. Numerous spin-offs for multiple platforms have also been developed. The series takes its title from beings summoned by characters in battle, manifesting from their personality.
Document 5: Horizon Zero Dawn: Horizon Zero Dawn is an action role-playing video game developed by Guerrilla Games and published by Sony Interactive Entertainment for PlayStation 4 and released in early 2017. The plot revolves around Aloy, a hunter and archer living in a world overrun by robots. Having been an outcast her whole life, she sets out to discover the dangers that kept her sheltered. The character uses ranged weapons and a spear and stealth tactics to combat the mechanised creatures, whose remains can be looted for resources. A skill tree provides the player with new abilities and passive bonuses. The game features an open world environment for Aloy to explore, divided into tribes that hold side quests to undertake, while the main story guides her across the entire map.
Document 6: List of Silent Hill series characters: The survival horror video games series Silent Hill features a large cast of characters. The games' player characters are "everymen", in contrast to action-oriented survival horror video game series featuring combat-trained player characters, such as "Resident Evil". The games are set in the series' eponymous fictional American town.
Document 7: Doom (series): Doom (stylized as DOOM) is a series of first-person shooter video games developed by id Software. The series focuses on the exploits of an unnamed space marine operating under the auspices of Union Aerospace Corporation (UAC), who fights hordes of demons and the undead in order to survive.
Document 8: BioShock 2: BioShock 2 is a first-person shooter video game developed by 2K Marin and published by 2K Games. It is the sequel to the 2007 video game "BioShock" and was released worldwide for Microsoft Windows, the PlayStation 3, and the Xbox 360 on February 9, 2010. Feral Interactive released an OS X version of the game on March 30, 2012. Set in the fictional underwater dystopian city of Rapture, the game's story takes place eight years after the events of the first "BioShock". Assuming control of Subject Delta, a hulking Big Daddy, players are tasked with fighting through "splicers", the psychotic human population of the city, using weapons and an array of genetic modifications. The game also introduces a story-driven multiplayer mode called "Fall of Rapture", which takes place during Rapture's 1959 civil war, before the events of the first game.
Document 9: Alma Wade: Alma Wade is a major antagonist and key figure in the "F.E.A.R." series of first-person shooter horror video games by Monolith Productions, introduced in "F.E.A.R." in 2005. The mystery of Alma is the very core of the series.
Document 10: Far Cry 2: Far Cry 2 is an open world first-person shooter developed by Ubisoft Montreal and published by Ubisoft. It was released worldwide for Microsoft Windows, PlayStation 3, and Xbox 360 in October 2008. It is the second installment of the main "Far Cry" series, preceded by 2004's "Far Cry" and followed by 2012's "Far Cry 3".
Document 11: Cold Fear: Cold Fear is a 2005 survival horror third-person shooter video game developed by Darkworks and published by Ubisoft for PlayStation 2, Xbox and Microsoft Windows. It was Ubisoft's first horror game, and Darkworks' second game, after "" in 2001. The game is centered on Tom Hansen, a member of the United States Coast Guard, who comes to the aid of a Russian whaler in the Bering Strait and finds a mysterious virus has turned the crew into zombie-like creatures. Discovering the involvement of both the Russian mafia and the CIA, Hansen sets out to ensure the virus doesn't reach land.
Document 12: Fatal Frame: Fatal Frame, titled Zero (零 , 〜zero〜 ) in Japan and Project Zero in Europe, is a survival horror video game series created and primarily developed by Koei Tecmo (originally Tecmo), and currently co-owned by Koei Tecmo and Nintendo. Debuting in 2001 with the first entry in the series for the PlayStation 2, the series consists of five main entries. The series is set in 1980s Japan, with each entry focusing on a location beset by hostile supernatural events. In each scenario, the characters involved in the present investigation use Camera Obscura, objects created by Dr. Kunihiko Asou that can capture and pacify spirits. The series draws on staple elements of Japanese horror, and is noted for its frequent use of female protagonists.
Document 13: Captain Qwark: Captain Qwark is a fictional character from Insomniac Games' "Ratchet & Clank" video game series. He first appeared in the 2002 video game "Ratchet & Clank" as one of the main antagonists. He then became the main antagonist of the second game. However starting with the third game onward, he switches sides and now assists the protagonists. In the series, Qwark is a selfish, deluded coward willing to do daring acts in order to gain money and publicity. He also has been known to temporarily side with the villains and betray his allies in order to save himself. However, as of the end of the third game, he has become much more moral, though he still remains a coward. Video game commentators have provided different opinions regarding the character; some criticized his personality calling him an "idiot" and "coward", while others praised his role as a villain.
Document 14: Far Cry (video game): Far Cry is a first-person shooter video game developed by Crytek and published by Ubisoft. The game was released for Microsoft Windows on March 23, 2004. It is the first installment in the "Far Cry" series, followed by 2008's "Far Cry 2".
Document 15: BioShock: BioShock is a first-person shooter video game developed by 2K Boston (later Irrational Games) and 2K Australia, and published by 2K Games. The game was released for Microsoft Windows and Xbox 360 platforms in August 2007; a PlayStation 3 port by Irrational, 2K Marin, 2K Australia and Digital Extremes was released in October 2008, and an OS X port by Feral Interactive in October 2009. A mobile version was developed by IG Fun. The game's concept was developed by Irrational's creative lead, Ken Levine, and was based on the ideas of Objectivism as promulgated by Ayn Rand, while incorporating influences from other authors such as George Orwell. The game is considered a spiritual successor to the "System Shock" series, on which many of Irrational's team including Levine had worked previously.
ground_truth: F.E.A.R.