Understanding the laser is crucial.

Does it work? With a modchip, yes, a PS1 can read CD-R game backups. Without a modchip, your console will reject the disc (Red Screen of Death or boot to Audio CD menu).

Some preservationists perform "reverse engineering" work on VCD games.

Do not search “PS1 VCD game download” – you’ll get fake, outdated, or virus-infected links.