"Our scouts have discovered an enormous gold deposit known as El Dorado. The Empire wants to take control of this region and extract the precious gold. Build a colony near the site. Destroy the ancient mining village that is now completely infected and mine gold for the glory of the Empire. Very dangerous infected have been detected at the site, do not try to enter without the backing of a large army."
The main challenge of this map comes with the Villages of Doom right behind the Command Center. It is recommended to expand toward southwest, while preparing defense on south and east.
Cleaning the gold mine and filling it with Quarry will normally gets you +7,000~ Gold income. You can pause other production buildings or dismiss units to reach the 8,000 objective.