CozyRune: an island in a week
CozyRune began on October 3, and the name and the island idea were settled that same day.
Within days it had its first quest and a meteor to go stargazing for. Your house got a mailbox, and the kart races were rebuilt in real 3D, along with a mountain climb.
It is free to play in your browser, on a phone or a desktop, with no download and no sign-up.