What are the best exploration based games on PS4?

Skyrim has no set character classes or equipment/spell limitations. Instead, it allows you to form your own class based on how you decide to play.

For example, sneaking increases your sneaking skill, hitting an enemy with a shortsword increases your one-handed skill, taking damage while wearing leather armor increases your light armor skill, and so forth. You can you play however you want and the resulting character will be a perfect match for your playstyle, giving Skyrim a different feel from other RPGs.