From the publisher's website:-
'Smallworld : Underground is a stand-alone game set beneath the surface of the same fun, light-hearted Smallworld universe of epic conquests and fallen empires.
Designed by original Smallworld author, Philippe Keyaerts, it features all new Races and Special Powers, and introduces Monster occupied regions that protect Relics and Places of great power!
Play Smallworld Underground on its own or combine it with other Smallworld game elements.'
Players: 2 - 5
Playtime: 60 Minutes
Ages: 8 +
Published by: Days of Wonder