From the publisher's website:

Get ready for a real-time survival game with hidden roles and deduction. -Survival: Players must work as a team to face the ultimate monster line-up -Real-Time: Each game is timed so players must act fast or be trapped forever -Co-op: Players must escape together to win as a team -Bluffing: If the “VIP” dies then everyone loses and the secret “Assassin(s)” will win the game! Whether your playing with the family or your awesome geeky pals, “Monster Mansion” is a whole lot of adventure packed into one box.