The gigantic, verdant landscape you see in the demo isn't just for show - as in Skyrim, every distant mountaintop, far-off forest, or apartment-complex-turned-waterfall is an actual area you can visit as you trek through the virtual wilderness. Better yet, Horizon: Zero Dawn does away with any load times, so your journey will be entirely seamless.
Each cyber-species can roam freely throughout the environment, with the capacity to react to each other even if Aloy's not directly involved. Guerilla Games has stated that the goal is to design the robotic wildlife in such a way that leads to memorable moments without the need for scripted vignettes. To help the player understand how these creatures are interacting with one another, the bright lights that function as their eyes are color-coded. Blue means they're just going about their instinctual business, yellow indicates that something has startled them, and red means they're either fleeing in fear or aggressively charging at their prey.