Perpetuity, an artificial star with a system of orbiting planets is misbehaving and slowly sinking into chaos. The inhabitants of the system will soon be lost to oblivion. Time is short, resources are scarce and heroes are desperately needed. Perpetuity: Grave Descent is a science fiction worker placement game for 1-5 players and plays Cooperatively, Competitively and Solo. Each round players place workers on work tiles to collect resources, repair damaged tiles, upgrade tiles, build ships and eventually fly missions to evacuate alien villages on the dying planets. Players must navigate a quickly changing game where lower level workers become less effective. Players must balance choices between keeping systems operational and spending limited resources on ships and rescue missions. "Perpetuity" itself (the artificial star) can be played by one of the players or a set of A.I. cards. Perpetuity in both cases works against the other players and attempts to hinder their evacuation efforts by unlocking abilities in Gravity, Space, Time and Matter. In Cooperative play, players race to save all the alien villages and workers. If any are lost when a planet is destroyed, the game ends in failure. In Competitive play, players vie for the most victory points by maximizing opportunities for points with repairs, exploration, evacuations and collecting resources.