Note to users of the EA App/Origin: Digital copies of SimCity 4 Deluxe purchased via EA.com, the EA App, or the Origin Store have been patched to Version 1.1.641 as of 1 June 2023, and are now fully compatible with the Network Addon Mod. The same is true if playing the game via an EA Play or Xbox Game Pass subscription.

For a complete walkthrough on installation, see https://www.sc4nam.com/docs/getting-started/