SimCity 3000 without the original CD, you must either replace the game's executable file with a modified "No-CD" version or purchase a digital DRM-free copy. This is often necessary for modern systems like Windows 10 and 11, which do not support the SecuROM or SafeDisc copy protection found on the original physical discs. Recommended Method: Digital Version (GOG)

The need for no-CD patches like the one for SimCity 3000 highlights the evolution of game distribution and digital rights management (DRM). With the advent of digital distribution platforms like Steam, GOG, and the Epic Games Store, many classic games, including SimCity 3000, have been re-released with modern DRM solutions that are more player-friendly.