What are the best exploration based games on PS4?

In Fallout 4 you have a lot of options when modifying your equipment, giving you a chance to make equipment that matches your playstyle.

You can take an assault rifle and change most of its parts. Each part you can change has an upside and a downside to it. For example, adding a long range scope would make the rifle useless in close quarters, but it would be great for pick off targets from afar.

You can also tailor your armors for various situations. You can lower the weight or add pockets to make carrying loot easier. Or you can add additional linings or padding to gain increased protection against various hazards such as radiation.