Has anyone ever heard of this RPG? I own it, and have skimmed it. It’s got a unique premise; but has a very traditional rules set (d20 +Skill/Stat vs target #).
http://www.world-tree-rpg.com/world-tree-a-role-playing-game-of-species-and-civilization/
http://www.world-tree-rpg.com/world-tree-a-role-playing-game-of-species-and-civilization/