Since the closure of the legendary XL Nation community hub, archiving efforts have moved to alternative platforms. You can reliably find active download mirrors, community patches, and active discussion threads on:

Once your core frameworks are in place, you can begin customizing your game with various asset categories. Realism and Custom Architecture

Start Cities XL Platinum. The game will automatically scan the Paks folder during the loading screen and integrate the new content into your menus. Crucial Tips for a Stable Modded Game