Is there a virtual online game where you can be a wild horse

I know about a game, but i dont know if you can be a wild horse. on youtube people made the riders invisible, but i dont know hpw to do that. it is StarStable. one of my friends said that in a quest you can get another horse. or have the ability to control the horse without riding it. i dont know much buit i thought you just had to be a star rider for it. (star rider is a speical ability to do more quests and go in all places)