Dry Erase Dungeon Tiles: Earthtone Square Booster Pack

Dry Erase Dungeon Tiles: Earthtone Square Booster Pack - Rules of Play says:

More flexible than a traditional battle mat, start your game with a single tile and connect the tiles as the adventurers explore new areas. Never again give away clues as to which way the corridors may lead due to starting placement on a large mat.