When I was a kid my grandpa had a ton of Commodore 64 games and we used to love playing them for hours on end during vacation.

He had one in particular that I always thought was cool but it was VERY tough (well, for a kid anyway). The problem is, I don't remember it's name.

Your character was this evil-looking guy... black cape, evil-looking moustache, etc. And you were on this tropical island. I remember there was a cave you could enter that was shaped like a skull.

The game itself was sort of an adventure-action style game I think.

Does anyone know what I'm talking about? Can you remind me what it's called?

The Goonies, maybe.

Me thinks Blackwyche or Dragonskulle

YES! It was Dragonskulle! I didn't know there was another one in the series. Thanks for the help on that!

You're welcome.
Actually those were 3-part series, with Dragonskulle being the last game.

...I find my nerdiness level disturbing ;_;