For the next 24 hours the folks over at the Humble Store are giving away Tropico 4 on Steam for free.

"The world is changing and Tropico is moving with the times - geographical powers rise and fall and the world market is dominated by new players with new demands and offers - and you, as El Presidente, face a whole new set of challenges. If you are to triumph over your naysayers you will need to gain as much support from your people as possible. Your decisions will shape the future of your nation, and more importantly, the size of your off-shore bank account."

Tropico 4 is available for PC and Mac and is rated very well on Steam and Metacritic so if you wanted to try this one out, head over to the Humble Store and pick it up for free now!