The Silver Case was directed and co-written by Goichi Suda in 1999 for the PlayStation console, featuring music by Masafumi Takada. A high-defintion remaster for personal computers and later PlayStation 4, adding arrangements by Akira Yamaoka.
The Silver Case: Deluxe Edition and The 25th Ward digital soundtrack are available for purchase through GOG.com and Steam.
From the product page:
1999 – Tokyo’s 24 Wards. The city has been plagued by a string of serial murders. The detectives of the 24 Wards Heinous Crimes Unit have their sights set on one particular suspect: Kamui Uehara, legendary serial killer and perpetrator of a number of assassinations of government officials 20 years prior in the now-famous "Silver Case". However, nobody knows who - or what - Kamui really is.GOG.com - The Silver Case Deluxe Edition
The Silver Case 2425 Limited Edition for Nintendo Switch due out July 6 in North America - https://t.co/lXaN3rckWJ pic.twitter.com/HTd3ViTneu
— The Ongaku (@TheOngaku) March 4, 2021