Question: Patriot Games is a spy thriller film, acted in by Harrison ford that is based on what?
Context: Clear and Present Danger is a 1994 American spy thriller film directed by Phillip Noyce and based on Tom Clancy's novel of the same name.  It was preceded by the 1990 film "The Hunt for Red October" and the 1992 film "Patriot Games", all three featuring Clancy's character Jack Ryan.  It is the last film version of Clancy's novels to feature Harrison Ford as Ryan and James Earl Jones as Vice Admiral James Greer, as well as the final installment directed by Noyce. Harrison Ford (born July 13, 1942) is an American actor and film producer.  He gained worldwide fame for his starring roles as Han Solo in the "Star Wars" film series and as the title character of the "Indiana Jones" film series.  Ford is also known for his roles as Rick Deckard in the neo-noir dystopian science fiction film "Blade Runner" (1982); John Book in the thriller "Witness" (1985), for which he was nominated for the Academy Award for Best Actor; and Jack Ryan in the action films "Patriot Games" (1992) and "Clear and Present Danger" (1994). Ankhen ("The Eyes") is a 1968 Hindi spy thriller produced and directed by Ramanand Sagar.  After the surprise big hit of "Farz" as a spy thriller, Sagar came out with a bigger budget film in the same genre, shot in many international locations.  The film stars Mala Sinha, Dharmendra, Mehmood, Lalita Pawar, Jeevan and Madan Puri.  The music is by Ravi and the lyrics by Sahir Ludhianvi.  It was estimated to be the most profitable Indian film of 1968 in India. Anthony David Leighton Scott (21 June 1944 – 19 August 2012) was an English film director and producer.  His films come from a broad range of genres, including the action drama "Top Gun" (1986), action comedy "Beverly Hills Cop II" (1987), auto racing film "Days of Thunder" (1990), action comedy "The Last Boy Scout" (1991), romantic dark comedy crime film "True Romance" (1993), submarine action film "Crimson Tide" (1995), psychological thriller "The Fan" (1996), spy thriller "Enemy of the State" (1998), spy film "Spy Game" (2001), action thriller "Man on Fire" (2004), sci-fi action thriller "Déjà Vu" (2006), thriller "The Taking of Pelham 123" (2009), and the action thriller "Unstoppable" (2010). Harrison Ford is an American actor and voice actor who has appeared in numerous films.  He is known for portraying Han Solo in "Star Wars" (1977), "The Empire Strikes Back" (1980), "Return of the Jedi" (1983), and "" (2015); Indiana Jones in "Raiders of the Lost Ark" (1981), "The Temple of Doom" (1984), "The Last Crusade" (1989) and "The Kingdom of the Crystal Skull" (2008); and Rick Deckard in "Blade Runner" (1982).  He also played Jack Ryan in "Patriot Games" (1992) and again in "Clear and Present Danger" (1994). Andadu Aagadu (translation: He Can Not Be Caught and He Does Not Stop) is a 1979 Telugu spy thriller film directed by S. D. Lal and produced by Shrikant Nahata under Shrikant Pictures.  The film stars Krishnam Raju and Latha Sethupathi in the lead roles.  The film has music composed by Chellapilla Satyam.  The film is a remake of the 1973 Bollywood film, "Keemat" starring Dharmendra and Rekha.  Krishnam Raju acted in a spy role which is parallel to James Bond.  The film was a blockbuster at the box-office. Patriot Games is a 1992 American spy thriller film directed by Phillip Noyce and based on Tom Clancy's novel of the same name.  It is a sequel to the 1990 film "The Hunt for Red October", but with different actors in the leading roles, Harrison Ford starring as Jack Ryan and Anne Archer as his wife.  James Earl Jones is the lone holdover, reprising his role as Admiral James Greer.  The cast also includes Sean Bean, Patrick Bergin, Thora Birch, Samuel L. Jackson, James Fox, and Richard Harris. Jack Ryan: Shadow Recruit is a 2014 American action spy thriller film directed by Kenneth Branagh.  Chris Pine, Kevin Costner, Kenneth Branagh, and Keira Knightley star in leading roles.  The film features the fictional character Jack Ryan created by author Tom Clancy.  It is the fifth film in the "Jack Ryan" series but is presented as a reboot that departs from the previous installments.  Unlike its predecessors, it is not an adaptation of a particular Clancy novel, but rather an original story.  Pine stars in the title role, becoming the fourth actor to play Ryan, following Alec Baldwin, Harrison Ford, and Ben Affleck. The Sum of All Fears is a 2002 American spy thriller film directed by Phil Alden Robinson, based on Tom Clancy's novel of the same name.  The film, which is set in the "Jack Ryan" film series, is a reboot taking place in 2002.  Jack Ryan is portrayed as a younger character by Ben Affleck, in comparison to "The Hunt for Red October" starring Alec Baldwin, along with the film's subsequent sequels, "Patriot Games" and "Clear and Present Danger", both of which starred Harrison Ford. Robert Rehme (born 5 May 1935 in Cincinnati, Ohio) is an American film producer whose credits include the films "Patriot Games", "Clear and Present Danger" and "The General's Daughter".  His first major job involving motion pictures was president of Avco Embassy Pictures in 1978, a post he held until 1981.  In 1983, he became co-chairman and chief executive officer of New World Entertainment, Inc until 1989, when he and producer Mace Neufeld co-founded the motion picture production company Neufeld/Rehme Productions.  It was during this time that he created the pictures for which he is most known, such as "Patriot Games" and "Flight of the Intruder".  Rehme served as President of the Academy of Motion Picture Arts and Sciences twice, between 1992–1993 and 1997–2001.
Answer: Tom Clancy's novel of the same name