It's critical to us that the gamer has responsibility over the landscape. The gamer's actions, or lack of actions, will influence the state of the landscape, and as a result, influence the availability of resources and the behavior of the lands' inhabitants. We will also be cycling between day and night. Some of the world's creatures live by day, others by night. A factory is in full production during the day, and tends to wind down at night.
Nocturnal creatures come out to hunt at night, but sleep in caves during the day.
You'll have the ability to wait out circumstances and decide that it would be wiser to attempt infiltration of a factory at night, rather than in daylight. Strategies abound when you have a playing field that behaves this way. The more fertile a land is, the more it produces plants, creatures, etc. These are all resources that the player depends on. The more barren a land is, the fewer resources it produces.