Big Book of Battle Mats Vol. 2 - Rules of Play says:
Attention Adventurers! Grab your dice and get ready to roll initiative as the game is afoot. The Big Book of Battle Mats Volume 2 is the ideal set of fantasy battle mats to keep you party rolling through any and every encounter. Through dungeons, across plains, through forests, town streets, down sewers and even into a mansion house, your quest for danger, excitement and treasure starts here!