Nintendo's revealed a new DS puzzle game called Rooms: The Main Building, which will be released on 21st May.
It's set in Rooms Mansion and the idea is to navigate your way out of hundreds of virtual rooms. Individual puzzles are built on the tile-sliding game of old.
Along the way, however, numerous items and devices spice up the formula. You may need to drain gradually rising water from a room, for instance, or blow-up a wall or teleport to another room.
Beat the challenge and there's a golden puzzle piece as a reward. This contributes to your eventual passage home. There are extra points for arranging the room's tiles to match the background image.
And a helpful tutorial character, Mr Book, will be on hand to lend advice.