The Anatomist (d20)
Have you ever thought that your dungeon exploration needs more mad science?
Enter the Anatomist¸ a class of characters dedicated to the practice of Medicine. Through their own skill and knowledge¸ they are capable of performing wonders of science that can compete with any magic. Stitching together new life-froms¸ re-animating the dead with a bolt of lightning¸ grafting pulsating new organs onto their patients and repairing even the most horrific injuries are this class's stock-in-trade¸ and they can frequently be found acompanying adventurers in search of new specimens and opertunities to experiment.
This class is broadly compatible with pretty much all OSR games¸ although it was written with basic-derived games in mind. It will fit best into those campaigns with a weird or gothic flavour.