Mutated Goblin

Concept: “The goblin-curse has twisted your body and racked your mind. Food. Eat. Bite.”
Content: A goblin character class with some really compelling features and callbacks to other published adventures
Writing: Simultaneously grim and playful—just like a goblin
Art/design: Relatively conservative (by Mörk Borg standards) but very clean and easy to read
Usability: Offers a host of character abilities but still not as complex as a certain dragon game