Game Up is an expansion promo pack for the adventure game Treasure Island. With this pack, John Silver can draw his secret mark on the game board using a washable UV marker. Players can search for the mark with a special UV light to gain additional information about the location of the treasure. In Treasure Island, you find yourself in the midst of the adventure novel of the same name! As the crew of the cunning Captain Long John Silver, you have just mutinied and are trying to recover the treasure, the location of which only he knows! You must pursue him with a multitude of questions and try to read between the lines to determine whether the information he provides is true or not. Long John is also one of your fellow players and will use a series of tricks to mislead his opponents as much as possible in order to find an escape route that allows him to claim the treasure for himself.