18 years after the game's release, on September 16th 2017, a Silent Hill fan community member by the name of roocker666 posted images of never before seen enemies hidden in the game's files online. These formerly unseen creatures include a giant headless frog (FRG), a possibly monkey based creature (MKY), an ostrich like creature (OST), a purple moth (BTFY), a manta ray (El), and a faceless snake (SNK).

Three additional models were discovered at a later date, including beta versions of the Larval Stalker and the Grey Children, and most notably a giant chicken (CKN) that was bigger than the others and is thought to have been intended to be a boss character.

Masahiro Ito, the game's background and creature designer, acknowledged the discovery on Twitter, but had no comment regarding the original purpose of the models.