Strange Ways: Six Classes and Alternate Magical Systems for Any OSR Adventure Game

From publisher blurb: Strange Ways offers you six playable classes for OSR adventure games (such as OSRIC or Swords & Wizardry,) each with unique subsystems for using powers far weirder than the average spells: Wield poisons, explosives, and drugs as an Alchemist. Burn away your foes as the Incinerator. Manipulate the powers of the mind with the Psion, Bend reality itself to your imagination as a Sorcerer. Become twisted by the powers of the Great Old Ones as one of the Voidwarped. Or make terrible pacts with alien spirits as a Witch.