The game is set on modern-day Earth, but most of humanity has disappeared. The game is what’s known as an open-world survival game, in which players collect resources, make tools and weapons, and try to stay alive as long as possible. That means it’s technically still in development, even though you can purchase it now for $59.99. “Fortnite” was published by North Carolina-based studio Epic Games and released in “early access” form last summer.