Question: Hitman: Agent 47 was basedf on the video game series developed by which Danish company?

Context paragraphs:
David Bateson: David Bateson (born 9 February 1960) is a South African actor best known for providing the voice of Agent 47, the protagonist of IO Interactive's video game series "Hitman".

Hitman: Enemy Within: Hitman: Enemy Within is the first novel in the "Hitman" series.  It was written by William C. Dietz and released on August 28, 2007, from Del Rey Books.  The novel's plot is set between "Hitman 2: Silent Assassin", "Hitman: Contracts" and "Hitman: Blood Money" and revolves around a rival murder-for-hire organization, known as "Puissance Treize" (French for "Power Thirteen"), attempting to destroy Agent 47's employer, the International Contract Agency (ICA).  The book's tagline is: "The clone assassin has been played long enough – now it’s more than a game."

Hitman: Sniper: Hitman: Sniper is a 2015 mobile shooting gallery video game in the "Hitman" series by Square Enix Montreal.  As the series' mainstay protagonist Agent 47, the player looks through a first-person sniper scope vision on their touchscreen device to assassinate several powerful figures who have assembled at a lakeside compound without alerting their associates.  The player uses the environment to find creative ways to kill these targets, sometimes prompted by secondary objectives.  Through mission progression, the player unlocks more powerful weapons and new weapon abilities.

Agent 47: Agent 47 is a fictional character and main protagonist of the "Hitman" video game series released by IO Interactive and Square Enix Europe.  He is consistently voiced by David Bateson.

Hitman: Agent 47: Hitman: Agent 47 is a 2015 American action thriller film directed by Aleksander Bach in his directorial debut and co-written by Skip Woods (who also wrote the original "Hitman" film) and Michael Finch.  It is based on the "Hitman" video game series, developed by IO Interactive, and its main character, a mysterious assassin known only as Agent 47.

Hitman: Absolution: Hitman: Absolution is a stealth thriller video game developed by IO Interactive and published by Square Enix.  It is the fifth installment in the "Hitman" series, and runs on IO Interactive's proprietary Glacier 2 game engine.  Before release, the developers stated that "Absolution" would be easier to play and more accessible, while still retaining hardcore aspects of the franchise.  The game was released on 20 November 2012 (which is in the 47th week of the year in reference to the protagonist, Agent 47) for Microsoft Windows, PlayStation 3, and Xbox 360.  On 15 May 2014 "Hitman: Absolution — Elite Edition" was released for OS X by Feral Interactive; it contained all previously released downloadable content, including "Hitman: Sniper Challenge", a "making of" documentary, and a 72-page artbook.

Hitman (series): Hitman is a stealth video game series developed by the Danish company IO Interactive.  Previously published by Eidos Interactive and Square Enix.  IO Interactive remained a subsidiary of Square Enix until 2017, when Square Enix started seeking sellers for the studio.  IO Interactive completed a management buyout, regaining their independent status and retaining the rights for "Hitman", in June 2017.  The series is available on Microsoft Windows as well as several video game consoles, including the Xbox, PlayStation 2, GameCube, Xbox 360, PlayStation 3, Xbox One and PlayStation 4.  The franchise includes two novels, "" written by William C. Dietz, followed by "Hitman: Damnation".

Hitman (2007 film): Hitman is a 2007 French-American-British action-thriller film directed by Xavier Gens and based on the video game series "Hitman".  The story revolves around Agent 47, a professional hitman, who was engineered to be an assassin by the group known as "The Organization".  He becomes ensnared in a political conspiracy and finds himself pursued by both Interpol and Russian intelligence.  The film stars Timothy Olyphant, Olga Kurylenko and Dougray Scott and was released on November 21, 2007 in the United States, November 30, 2007 in the United Kingdom and December 26, 2007 in France.  Though critically not well-received, it was a financial success, grossing $99 million against a $24 million budget.

Hitman 2: Silent Assassin: Hitman 2: Silent Assassin is a stealth video game developed by IO Interactive and published by Eidos Interactive for Microsoft Windows, PlayStation 2, Xbox and GameCube.  It is the second installment in the "Hitman" video game series and the sequel to "".  The game was re-released for Windows through the Steam online distribution service and later a DRM-free version was available through GOG.com.  A commercial success, the game has sold more than 3.7 million copies as of 23 April 2009 and is the best selling "Hitman" game to date.

Hitman: Codename 47: Hitman: Codename 47 is a stealth video game developed by IO Interactive and published by Eidos Interactive exclusively for Microsoft Windows.  It is the first installment in the "Hitman" video game series.

Supporting paragraphs: Hitman: Agent 47 Hitman (series)
Answer: IO Interactive