Grim Beasts is a series of prototypes for a physics based multiplayer fantasy party game with beasts and environmental hazards; examples of early tests include a frozen ice platform that fractures and breaks, a hostile cephalopod that brutalises a ship, a cave with collapsing rock pillars, and an exposed mountainside with erratic winds that can blow characters off rickety bridges. We currently plan to support Windows, OS X, and Linux. We will add support for the XBOX ONE and PS4 consoles if we can secure the necessary permissions (and if Unity support becomes available