I don't play on PlayStation 4 very often, so when I do it's generally for a very good reason. Horizon Zero Dawn is so good that I finally figured out how to stream from PS4 to YouTube. The game has a solid open world exploration dynamic that starts with an emphasis on stealth but can evolve into other combat styles depending on how you invest skill points. The story is pretty great too.
The first 30 minutes covers the main tutorial and back story leading up to the first opportunity to really free roam:
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This was one of my favorite open world games. The mixture of quests and various environments kept my interested throughout the game. I love being able to stealthy kill a few enemies, but still have ability to tackle head on if needed. I look forward to what Guerrilla Games has in development. They have won me over as a fan.