I had a bit of trouble this week so I had to wander over to the HeR message boards. From what I read and what I figured out on my own, I think I got it.
Each key is from a different game. In order they would be:
There was only one I couldn't pin point.
Anyway, take the full title of each game and with the number next to each key, count until you reach that number letter in the title.
Example: The first key is from The Creature of Kapu Cave. The fourth letter is C so the first letter in the answer is C.
The answer is:
CREEPY ANIMAL IN DED
Now the question is, what does that mean?