The context for each Unlock! game is both unique and thematic. In this particular one :, The Nautilus’ traps bring you to the bottom of the sea. When a sea monster attacks your submarine at the outset of the adventure, it's up to you to make your way through the depths and back to the surface if you're going to escape…before your oxygen runs out.Unlock! is a cooperative card game inspired by escape rooms that uses a simple system which allows you to search scenes, combine objects, and solve riddles. Play Unlock! to embark on great adventures, while seated at a table using only cards and a companion app that can provide clues, check codes, monitor time remaining, etc.