Create your dream character and play in a world that responds to you. Such as any type of superhero with any type of powers. Different worlds from 1600 Japan to a zombie apocalypse. This game isn't getting enough attention as it should, and it needs funding.
Sidenote: I'm not affiliated with the game in any way, I am only doing this because this concept is something the nerd inside me dreamed of since I was a little kid, and maybe you shared that dream.