Diablo was apparently planned for the original GameBoy, and even made into a demo by Blizzard. Must’ve been done between the PC & Mac release in 1996 and the PlayStation release in 1998. PtoP has the first media ever released for the cancelled GameBoy version of the action-RPG Diablo.
It’s described as: “Basically, you can walk around, swing your weapon, and hit the Start Button on the Main Menu. Yep, thats it. The character does walk around smoothly, and actually looks really damn nice for a normal GameBoy game.”
Video via Joystiq