Asteroidea is a 2D action-exploration game where you play as a starfish in a vibrant alien sea. Meet many interesting ocean-dwellers and collect shiny items. The game features Twitch integration in the form of guest fish who interact with the world and earn things, too.

An android starfish is in an alien sea in what appears to be a game show hosted by humanoids living on or near this planet. This reality makes for a lot of strange situations for the ocean-dwellers.