Development took approximately two years, and included a staff of thirty developers. Preliminary planning and creation of the backstory extended to several years before that. The word "Xeno" had been decided between staff from an early stage, with its meaning being "something strange or alien". "Gears" was chosen from multiple suggested words. The game's Gears were not present during early stages, with their places being filled by traditional summoned monsters. The game's use of anime cutscenes was chosen as it was difficult to properly recreate Tanaka's Gear artwork into 3D CGI. The game's engine was also designed to be best suited for the 3D map displays and battle arenas. Takahashi had wanted to create the game in full 3D, but the PlayStation's capacities meant this could not be managed, resulting in the current mesh of 2D sprites against 3D backgrounds. The themes and story were greatly influenced by the works and philosophies of Friedrich Nietzsche, Sigmund Freud and Carl Jung, as well as dystopian science fiction films such as THX 1138 and Soylent Green. According to Tanaka, the reason for this correlation was simply due to a common interest with her husband. According to her, the story revolved around "where do we come from, what are we, where are we going". There was a large portion of story and artwork that did not make it into the final game. The game's second disc consisted mainly of narration by Fei and Elly of events following the party's escape from Solaris. While it was popularly assumed to be due to budget constraints, Takahashi later revealed the full reason; as his team was inexperienced they were unable to create the entire proposed game in the expected two-year development time, so instead of ending prematurely with the end of the first disc, Takahashi offered up a compromise which became the second disc's content, allowing the staff to finish the game within time and budget deadlines.
Development took approximately two years, and included a staff of thirty developers. Preliminary planning and creation of the backstory extended to several years before that. The word "Xeno" had been decided between staff from an early stage, with its meaning being "something strange or alien". "Gears" was chosen from multiple suggested words. The game's Gears were not present during early stages, with their places being filled by traditional summoned monsters. The game's use of anime cutscenes was chosen as it was difficult to properly recreate Tanaka's Gear artwork into 3D CGI. The game's engine was also designed to be best suited for the 3D map displays and battle arenas. Takahashi had wanted to create the game in full 3D, but the PlayStation's capacities meant this could not be managed, resulting in the current mesh of 2D sprites against 3D backgrounds. The themes and story were greatly influenced by the works and philosophies of Friedrich Nietzsche, Sigmund Freud and Carl Jung, as well as dystopian science fiction films such as THX 1138 and Soylent Green. According to Tanaka, the reason for this correlation was simply due to a common interest with her husband. According to her, the story revolved around "where do we come from, what are we, where are we going". There was a large portion of story and artwork that did not make it into the final game. The game's second disc consisted mainly of narration by Fei and Elly of events following the party's escape from Solaris. While it was popularly assumed to be due to budget constraints, Takahashi later revealed the full reason; as his team was inexperienced they were unable to create the entire proposed game in the expected two-year development time, so instead of ending prematurely with the end of the first disc, Takahashi offered up a compromise which became the second disc's content, allowing the staff to finish the game within time and budget deadlines.