world, with brutal uncompromising combat", and stated that they wanted to "make a smaller, more focused game experience that is uncompromising in its combat, art and story". The developers called it an "independent AAA game", with their goal being to make a game with all the qualities and production values of any AAA game on the market, but with creative freedom and an "indie spirit". The team eventually succeeded in releasing the game independently, but to achieve this could only release it via digital distribution. Hugues Giboire, art director of the previous Ninja Theory game Heavenly Sword, rejoined the studio to work on the game. A Windows version of the game was announced on January 9, 2015. The game is powered by Unreal Engine 4, and was made by Ninja Theory with a team of around twenty developers. Its subtitle, Senua's Sacrifice, was announced in March 2016. Hellblade: Senua's Psychosis, a short documentary film included with the game, details the concept behind its story and inspirations, notably the team's study of mental illness. It was written and narrated by Antoniades, and edited by Juergens. Writing The main inspiration of Senua's character was the Iceni queen Boudica, while her name came from Senuna, a Celtic goddess long lost to historians but re-discovered in 2002, whose name was at first read incorrectly as Senua. Based on what is believed of the way Celtic warriors looked, Senua was given war paints, and braided hair clumped with lime. Doing research to find the right angle for the character, the team realized that despite the Roman Empire being able to conquer nearly all of Europe, they were unable to conquer a group of Celts, known as the Picts, in the northern reaches of Great Britain. Towards the end of the 8th century, the first Vikings arrived in the lands of the Picts, more specifically the islands of Orkney, and replaced them as the main population of the land. Based on the belief that the Norsemen were known for sacrificing the leaders of the tribes they had conquered to their gods, the game's director and lead writer Tameem Antoniades decided to use this as the basis for Senua's quest and trauma, and to have her find everyone in her village killed by the Norsemen and her lover sacrificed to Norse gods via the blood eagle, a ritualized method of execution whose authenticity is actually debated among