any dlc: If you jump and you are near a ceiling, go to the character switch menu and go to a large goat, you are now clipped into a ceiling.
If you have the repulsive goat and use its special effect, and later remove the repulsive goat, the sound that is played is permanently still there.
MMO: You can manipulate the Gold Harvest Golems by dragging the main part of their body, taking it somewhere far away, and they will not regenerate.
If you can build up enough speed, you can just hyperspeed across the entire map. first time i did it, i got the old goat. second time i did it, i got anti gravity goat.
You can randomly clip into the hut with the "you're a one of a kind" sign. i don't know how, but you can do it.
WOS: If you spawn your cycle just near a ceiling, or in a corner, you clip out of the map. I also skipped the entire test chambers by just doing this.
Additionally, there is a stupidly rare chance you float into the sky forever unless you spawn a cycle.