Archive.org has a huge list of PlayStation demo disc ISOs. Downloading one now containing Silent Hill; I remember it being somewhat different to the final cut of the game 🤔 Can't wait
PlayStation 2 Demo Disc 2.1 : Sony Computer Entertainment : Free Download, Borrow, and Streaming : Internet Archive
PlayStation 2 Demo Disc (PBPX-95506) : Sony : Free Download, Borrow, and Streaming : Internet Archive
Sony PlayStation 2 PS2 Demo Disc PBPX-95506 3-073-543-02 (1) | eBay
Playstation 2 Demo Disc (PBPX 95205)(Sony) : Free Download, Borrow, and Streaming : Internet Archive
SCEE Demo Disc Menu - PSX Planet: SONY PlayStation Community
PS1 and PS2 demo discs : Free Download, Borrow, and Streaming : Internet Archive