Gaming

Deathtrap Dungeon is the one everyone raves about that I didn't have 

Also... Zurks 

That Mirror Demon was creepy.

I think my favourite of the FF books I have is Seas of Blood

Deathtrap Dungeon was my favourite followed by Island Of The Lizard King.
I got a bit frustrated with Forest Of Doom. I think that was the one with the awkward repetitive maze that I couldn't get out of, if I remember correctly, and I probably don't.
I also had some of the later Sci-fi ones but they weren't that interesting. Or maybe I was just growing out of that phase by then.

Valence wrote:

Or maybe I was just growing out of that phase by then.

*has never heard of any of it...*

It's what we did before computer games.

Roll two dice and subtract the sum from your stamina and if you're not dead then turn to page 145.

The sci-fi ones were a bit drab though. The format seemed to work best in "olde" fantasy settings but I did also have a couple of Indiana Jones ones which tried to rip off the concept.

Before computer games.... I'd draw (or read)

I had mine at the same time as computer games 

EDIT - They are books, so reading was a large part of the process