The expansion fixes many bugs and adds the Nano Age. Install it immediately after the base game. Then:
Even after installation, Empire Earth tends to crash to desktop (CTD) on modern systems. Apply these fixes: Empire Earth Free Download For Windows 10
: Revives multiplayer lobbies and improves stability on Windows 8, 10, and 11. Where to find : You can download it from the Empire Earth Community The expansion fixes many bugs and adds the Nano Age