*seriously looking at keyboard* Well, there're actually 2 things you will need to enjoy Proteus:
First, a great sense of imagination.
Like in the Atari 8-bit era where everything is better defined by your mind, not the graphics. Where some jumping pixels beside you is actually a wild animal that just passed by. Where you're offered a gorgeous view in front of your eyes, but need a open mind to really SEE the view, and not the pixels representing it.
In Skyrim, if you can feel the wind while looking at the horizon on top of a mountain, you may know what I mean.
(But if you're not able to understand any of this, "f@#% off back to Gears of War!")
Second, headphones. Without headphones the immersion is really compromised.
And that's it! Get yourself in a comfortable chair, a beverage/drink beside you, and take trip to Proteus. It probably won't last too long, but you'll be back if you've done things right.
FORMAL review: Proteus is a first-person exploration game/experience. Take a look at settings, tweak the mouse sensitivity to your preferences and remember that "space" makes you sit and "F9" saves the island as a "postcard".