Two genres of video games might be the most expensive to make: the open-world sandbox and the life simulator. The former requires not only ample open space to explore but also land that is densely packed with content and enough realism to maintain player immersion. Developers making the latter need to take into account hundreds and thousands of optional player activities and make them all fun enough to make up for the free-form lack of structure that the player expects. Only a few studios have the time, talent, or money to make either, but even fewer have the resources to do both simultaneously.