Bundle of Holding is running a pair of PDF deals on the Scandinavian dark fantasy RPG Symbaroum right now. This includes a ton of setting material about a forbidding enchanted forest and its malevolent denizens, and the Empire's continuing attempts to conquer and exploit it.
The setting and adventure material look like it would be fairly easy to convert to another RPG system of choice. The included traditional RPG ruleset is a fairly straightforward d20 "roll under" system that uses the standard polyhedral dice set.
The game also serves as a metatextual commentary on imperialism and colonialism.