Title: Amnesia: The Dark Descent
Content:  Amnesia: The Dark Descent is a survival horror adventure video game by Frictional Games, released in 2010 for Microsoft Windows, Mac OS X and Linux operating systems, in 2016 for the PlayStation 4 platform and in 2018 for the Xbox One. The game features a protagonist named Daniel exploring a dark and foreboding castle called Brennenburg, while trying to maintain his sanity by avoiding monsters and unsettling events. The game was critically well-received, earning two awards from the Independent Games Festival and numerous positive reviews. Originally released independently via online distribution, the game has since been published in retail by 1C Company in Russia and Eastern Europe, as well as THQ in North America. A collection of five short stories set in the world of Amnesia, written by Mikael Hedberg and illustrated 
Title: Amnesia: The Dark Descent
Content:  the game's concept artists, was also made available. In addition, the game's soundtrack is available for purchase and a free content expansion Justine has been released, as well as many fan-made expansions and stories for its unique "Custom Story" game mode. The Amnesia Collection – which contains The Dark Descent, its Amnesia: Justine expansion and the sequel, A Machine for Pigs – was released for PlayStation 4 on 22 November 2016, and for Xbox One on 28 September 2018. The same collection was released on the Nintendo Switch on 12 September 2019. It was announced on 23 September 2020 that Amnesia: The Dark Descent would be made open source. A second sequel, developed by Frictional Games, Amnesia: Rebirth, was announced on 6 March 2020, and was released on 20 October 2020.
Title: Amnesia: The Dark Descent
Content:  in August 2010. This was later rescheduled, and the game was then expected to have an 8 September 2010 release. It was then later announced on 27 August 2010 that the game had officially gone Gold and would soon be ready for sale. On 3 September, the game's demo was released containing selected parts of the gameplay and story. It was then successfully released on 8 September 2010. If the game reached 2000 pre-orders by 31 May 2010, Frictional promised it would release extra content for the game. The goal was finally met in early May, after the pre-orders were offered at a discount made available until 31 
Title: Amnesia: The Dark Descent
Content:  would later write up a post-mortem of the game titled "The Terrifying Tale of Amnesia" for The Escapist, where he outlined in detail the process of the game's development, mostly focusing on its ever-changing design and the financial problems that plagued the developers for most of the game's development. A PlayStation 4 version – Amnesia Collection – was released on 22 November 2016 via PlayStation Network; this title includes The Dark Descent, its expansion Amnesia: Justine, and the sequel Amnesia: A Machine for Pigs. Just two days after its release on PS4, Frictional Games posted a tweet stating that the port managed to recoup all costs and "more".
Title: Amnesia: The Dark Descent
Content:  An indirect sequel called Amnesia: A Machine for Pigs was released on 10 September 2013, developed by The Chinese Room and published by Frictional Games. A Machine for Pigs is an indirect sequel to The Dark Descent which, while set in the same universe, takes place in an alternative history with different characters. The third game in the series, titled Amnesia: Rebirth was announced on 6 March 2020. Rebirth, the second Amnesia game to be developed by Frictional Games. A gameplay reveal trailer was uploaded on 2 October 2020 to a positive reception. The game was released on 20 October 2020 for PlayStation 4, Linux and Windows.
Title: Amnesia: The Dark Descent
Content:  difficulties that plagued the combat in that game however, and the design was further changed to be more similar to the style set out by Overtures sequel Penumbra: Black Plague. On 5 February 2010 it was announced that the game had reached the alpha stage of development on all platforms. Two weeks later the developers released a new teaser trailer that showed actual gameplay footage, and the developers began accepting pre-orders for the game through their website. Also revealed was that the game was at that point being tested on all three intended platforms. It was also announced that the game would be released simultaneously for all of 
Title: Amnesia: The Dark Descent
Content:  Amnesia: The Dark Descent has received very positive reviews from critics, with consistent praise given for the ominous atmosphere and horror elements: "By strongly focusing on vision and hearing, the distance between player and game is radically diminished. This is technically reinforced by the game's minimal handling." John Walker of Rock, Paper, Shotgun even went as far as to say that "I think it is safe to say that Amnesia is the most successfully frightening game to have been made." X-Play added Amnesia to its top ten PC games saying "There are a lot of so-called "horror" games out there, this one is no joke. 
Title: Amnesia: The Dark Descent
Content:  2011 Independent Games Festival Amnesia won awards for both "Excellence in Audio" and "Technical Excellence" along with the "Direct2Drive Vision Award" which included a $10,000 prize. A year after the original release of Amnesia, the developers revealed that they had sold around 391,102 units and were continuing to sell about 6,000 units per month. They also released details about how much money each platform generated for them by analyzing the sales from their online store, with 70% of sales coming from Windows users and 15% coming from users of Linux and another 15% coming from users of Mac OS X. Frictional did however note that 
Title: Amnesia: The Dark Descent
Content:  Work began on the game while Penumbra: Requiem was still being developed, with the company working on both projects at the same time. The game was first known under two working titles: Unknown and Lux Tenebras. It was not until 3 November 2009 that it was announced as its current title, Amnesia, and 13 November with the release of the game's website and a game trailer. Initial designs of the game varied considerably from the final game, with the developers interested in reintroducing more combat elements similar to those utilized in their first commercial title Penumbra: Overture. The developers soon discovered that they encountered many of the same problems 
Title: Amnesia: Rebirth
Content:  Amnesia: Rebirth is a 2020 survival horror video game developed and published by Frictional Games. It was released for Microsoft Windows, Linux and PlayStation 4 on October 20, 2020. It is the third installment in the franchise and serves as a sequel to Amnesia: The Dark Descent (2010). The game received generally favorable reviews upon release.

Question: when did amnesia the dark descent come out?
Answer: 8 September 2010.