You can unlock various goats by acquiring the corresponding number of trophies, as indicated below.
- Tall Goat - Taller than everyone else (5)
- Feather Goat - Can jump higher than others (10 or 15)
- Giant Goat - Can blow water (20 or 25)
- Space Goat - No apparent benefits (30)
You will unlock Angel Goat status if you don't cause any environmental damage for about 8 minutes. Just stand still if you like. As Angel Goat, you can jump higher and your active ability allows you to glide through the air with a low drop rate, useful if you need to get around the rooftops. You'll also have a halo.
You should notice a spiral tower with a fence surrounding its base, not far from where you spawn. Climb those stairs to the top floor to arrive in a throne room. You can stand on the throne to be acknowledged as the Goat King. As the king, you wear a skull mask and you can press the Action button to produce goats whenever you like.
Look for a glowing red pentagram, located near one of the town's corners. It's positioned next to the electrical tower that you can see off to the far left, if you stand near the base of the water slides at the community pool. Once you place five human or goat bodies on the pentagram, you will become the Devil Goat. Note that if you're looking to expedite the process, you can become the Goat King and quickly summon goats to the desired spot. When you become the Devil Goat, it's possible to fly if you summon a Black Hole and enter Rag Doll mode.
You can play a parody of the mobile game Flappy Bird. Head to the Coffee Stain Studios building, located near the mountains. Go upstairs and you'll find a TV in a back room. Attack it to turn it on, at which point you can play Flappy Goat.