Do you really think you're safe in your dreams? That's only because you haven't opened Pandora's Box.
A Pandora's Box covered in strange patterns appears in everyone's dreams. The first people to encounter and open it are drawn into the same dream, where they play different roles. They can only wake up by clearing one stage after another, fleeing deadly pursuits and escaping perilous situations.
Dreams are reality, and dying in a dream means dying in real life.
Why do you want to sleep? Because the you over there is about to wake up.
Theme: A team-based level-clearing game.