From Guardian Moon:
Destination Danger is a pocket-sized role-playing adventure set in the 1930s that can be played anywhere, anytime, and with anyone—you don’t even need a table to play on. The cards in the Destination Danger deck contain all the information needed for a quick and fun role-playing experience (no player’s guide or DM book required!). Since Destination Danger uses simple stats and easy-to-remember rules, anyone—regardless of role-playing experience—can join in and have a blast.
Destination Danger is a form of cooperative storytelling in that each player takes on the role of his or her assigned character(s) OR as the Game Master who controls everyone and 
The Game Master uses the other cards in the deck—monsters, maps, items, etc.—to move the game along. Each card is intelligently designed for optimal Game Master use. One side is the public side, with beautiful illustrations and easy-to-read names; this side can be shown to all the players or passed around for them to see up close. The private side is for the Game Master only. It contains a brief description of the monster/item/whatever and then a list of options for how it can be used within the campaign. These might be character traits, secrets, curses, effects—you name it. Nothing listed in the options list is set in stone, of course; they are just suggestions for the Game Master to pick and choose from. Use some, ignore others, make up your own – this way the gameplay is different each time!
