Who is Walter in the silent hill 2 game?

Answer 1

During Silent Hill 2, Walter was a prison inmate, imprisoned for the gruesome murder of two children killed as part of his brutal ritual attempt, that would become (in Silent Hill 4: The Room) renowned as the 21 Sacraments. Reportedly, in a newspaper found in the trash of the first apartment complex in SH2, Walter killed himself using a spoon while imprisoned and was later buried in an unnamed grave, however there was speculation of this Walter being false or else an apparition.

He later resurfaces during the events of Silent Hill 4. While he supposedly died in prison, it's said that the Walter who killed himself in jail was an imposter, while the real Walter sealed himself in a hidden room of 302 and sacrificed himself as 11/21 of the sacraments, later returning as a ghost and antagonist of the fourth Silent Hill title. (Clarification welcome, I have to replay these titles for accuracy; it's been a while.)