How do I obtain DLC for Tropico 4: Gold Edition?
Double-click on the Tropico 4: Gold Edition Application icon while holding down the Command (⌘) key. The Tropico 4: Gold Edition pre-game Options window will appear.
Select the DLC tab.
A list of available DLC will appear. Scroll down the list to the one you wish to purchase and click the View in the Feral Store button.*
You will be taken to the Feral Store page for the DLC you have selected. Once you have purchased it, you will receive a DLC key in an e-mail.
Click on the Activate my DLC button in the DLC tab.
Enter your DLC key into the six empty boxes.
Click the Activate Online... button. A dialog box will appear confirming that your DLC has been activated.
Click OK. The DLC will now be enabled in your copy of Tropico 4: Gold Edition.
*If you wish to purchase DLC from an alternative download store, you can do so and resume the instructions from point 5.