Lost in Blue is a survival game developed by Konami for the Nintendo DS, released in 2005. The game casts players in the role of teenagers stranded on a deserted island after a shipwreck. They must work together to gather resources, manage their energy and health levels through food and rest, and eventually find a way to escape the island. The gameplay involves survival skills such as hunting, fishing, and crafting, as well as solving puzzles to progress the story. The game takes advantage of the DS's dual screens and touchscreen for various gameplay mechanics. It is noted for its open-ended, sandbox-style gameplay set in a challenging environment.