The Wood surrounds and divides the realm and anyone (or anything) that has not yet sworn fealty. The Wood is not one forest, but all forests. The Root is the realm of mystery and horror underneath, and does not care for the petty divisions overground.
Cairn is the DriveThruRPG Platinum Best Selling adventure game about exploring a dark and mysterious Wood filled with strange folk, hidden treasure, and unspeakable monstrosities. Character generation is quick and random, adventures are tense and reward careful exploration, and combat is frantic and deadly. The first edition rules are freely available here, and should be familiar to any fans of Knave and Into the Odd.
The definitive second edition has been freshly revised and developed, and includes an expanded Player’s Guide, a brand new Warden’s Guide, and a new adventure Trouble in Twin Lakes in a robust and lavishly illustrated boxed set packed with useful gaming tools.