These games are everything from Assassin's Creed (featured in the following screenshot to Skyrim and everything in between. They are completely 3D immersive, explorable, and interactable environments. When you think about the design of a 3D game, you need to think about what the physical environment will look like. What kind of objects will be in it? How does the player navigate around them and through the world? For example, think about where you are right now.

If you had to turn your current environment into one that would be in a video game, what kinds of objects would you need to create? Perhaps a desk or chair, maybe a lamp? Then, how would players interact with these objects? What kind of effects would occur, such as a player turning the lamp on or off?

There are many basic and intricate details that go into making a 3D environment. Of course, they are not exclusive to 3D environments, as we will see in the other types of games, but these are some fundamental considerations.