Is the demo version of the base game enough to play this, or is the full version required?
Viewing post in 2D6 Dungeon Expansion - The Beast of Pencarrow Moor comments
I think the 2D6 demo version should suffice as it contains the full rules, just in the 2D6 demo you only get one level of the 2D6 dungeon to explore. This expansion contains it's own special creature cards and tables, and references only a few tables and creatures from the core rules table codex. If you come across a creature it references that is not in the free demo version (e.g. a Level 2 creature), you could substitute it for a beefed up Level 1 creature (double it's HP, remove any -x from it's attack damage); from a cursory glance I think there's probably only one such creature.