'Horizon Zero Dawn' is an incredible, must-play game that's reason enough to buy a PlayStation 4

I mean that literally. Over and over, I'd be walking, or more likely running, through the massive open world and be overwhelmed by how gorgeous it is — so much so, in fact, that I would stop walking and just marvel at the incredible virtual world on my PlayStation 4.

And that's before we even start discussing the giant metal dinosaurs.

But let's back up. "Horizon Zero Dawn" is a brand-new game for the PlayStation 4, available as of Tuesday. If you own a PlayStation 4, it's a must-play. If you don't, it's a worthy reason to buy a PlayStation 4. No caveats — seriously.

Here's why.

"Horizon Zero Dawn" is a third-person action-adventure game — think "Assassin's Creed" or "Batman."

The main character, who you play as, is named Aloy. She's an outcast of a tribal culture (the Nora tribe). She's been an outcast since birth.

The story of "Horizon Zero Dawn" is Aloy's journey. Where is she from? Who is her mother? Why was she shunned at birth, doomed to be an outcast in her culture?

And yes, before you ask, that journey also ties into the name of the game. "Horizon Zero Dawn" isn't just word soup — you'll understand (and maybe even like) the name by the end.

The setting of "Horizon Zero Dawn" is part of what makes the game so amazing: It's roughly 1,000 years in the future on Earth.

So why have humans regressed to tribal culture?

And, more importantly, what's the deal with these robot animals?

These questions are at the heart of "Horizon Zero Dawn," and they're a major part of what makes it such a fascinating and incredible game.

On your journey to enlightenment, you'll face a lot of challenges, like ferocious metal animals ...

... other humans ...

... and the occasional metal dinosaur, naturally.

Part of what makes "Horizon Zero Dawn" so incredible is the interaction between your character and the metal animals. They're dangerous, and Aloy is equipped with only a bow for much of the game.

When I first saw a Thunderjaw, for instance, I panicked. It's hard enough taking down human enemies — how in the world do you take down a massive metal T-rex?

Rather than having "magical powers" or some nonsense, Aloy uses a variety of arrows to tactically dismantle robots. In this way, "Horizon Zero Dawn" smartly encourages you to stay cool in tense situations. The way out of a bad situation is rarely brute force.

As Aloy learns more about the world and herself, she picks up new skills, like overriding robot animals and, say, using one as a horse.

Aloy can ride only a handful of the animals, and that can be extremely useful for traveling long distances. There's a "fast travel" system in the game, but it's limited intentionally to encourage exploration.

Exploring the world of "Horizon Zero Dawn" is the absolute best part of the game. It's gorgeous, varied, and rich with environmental storytelling. There are sweeping desert canyons ...

... snowy mountain peaks ...

... lush forests ...

... and abandoned cities.

Much of the 50-plus hours I spent in the world of "Horizon Zero Dawn" was just me walking around between objectives. That's because there's so much to do. I could go hunting for real animals, which I could turn into stuff like larger arrow quivers.

Or I could go exploring one of the game's hidden "bunkers," which act like tombs in a "Tomb Raider" game. They're massive puzzles with big payoffs in both story and gameplay. (Excuse my ambiguity as I try not to spoil major parts of "Horizon Zero Dawn.")

"Horizon Zero Dawn" takes elements of gaming's greatest hits — "Mass Effect," "Assassin's Creed," "Tomb Raider," "Batman," "Far Cry," and more — and melds them into something entirely fresh and exciting.

It's without any caveat that I'd suggest "Horizon Zero Dawn" to anyone who likes great video games. It's an incredibly impressive first entry — in what is sure to become a major franchise — exclusive to Sony's PlayStation consoles. Don't miss it!