Short answers, pulled from the story.
Team Silent was an internal division within Konami Computer Entertainment Tokyo that existed from 1999 to 2004. The group created the first four entries in the Silent Hill franchise before being quietly dismantled by its parent company.
Keiichiro Toyama directed the original Silent Hill game released in 1999. He approached the project with a vision that defied the conventions of the time and later joined Japan Studio in 1999 to create the Siren series.
Team Silent was dissolved through a corporate merger in April 2005 when Konami absorbed KCET into its parent company. This event effectively erased the collective identity of the creators who had built a multimedia empire of fear.
Masahiro Ito served as the background and creature designer for the Silent Hill franchise. He drew inspiration from surrealist art and the works of H.R. Giger to create the game's iconic monsters, including the infamous Pyramid Head.
Silent Hill 2 was released in 2001 and was directed by Masashi Tsuboyama. The game moved away from the supernatural horror of the first game to explore themes of guilt, grief, and psychological trauma.