A Goat is a hardy domesticated ruminant animal that has backward curving horns and (in the male) a beard. It is kept for its milk and meat and is noted for its lively and frisky behavior.

A Goat can do what we call "Mutating", and it can mutate into many other creatures. To help you on your Path to becoming a goat, we suggest playing the very accurate Goat Simulator. Observe the way the Goat rides a skateboard, which you can find in Goat bay or whatever the name of that ****y town is. Observe the way a goat uses a jetpack. Observe the way a Goat does 1080 Triple Backflip off a building, and you human, will soon have the ability to mutate into a goat. Play the game for about 100 Hours to get the feel of a goats life.

In Order to actually be a goat, you will have to unlock all achievements, purchase all DLC (and get those achivements) and, that's including the soundtrack. In order to be a goat you need to get all trophies and read the spoiler text once you have done all of this.

Haven't You Realized?
There's no way to be a goat. It's impossible. For a human like you, no matter if you could mutate you will never be able to match the intelligence, the superiority or how dominant they are. They rule while we humans think we do. Goats are exactly where they want to be. And as you can tell yourself, you are desperate to stop simulating and be a goat. THAT WILL NEVER HAPPEN.