I just saw this on Wow Insider:
Have you ever heard of Blackthorne? Originally released in 1994 for the SNES, this classic platformer was the one of the first titles to be released under the name Blizzard Entertainment. And now, it appears as though the game can be had for free. Head to your Battle.net account, and hit the Download Game Clients page, under the Games & Codes tab. At the bottom is a new section titled Classic Games, and Blackthorne can be downloaded for Windows absolutely free.