
Finished! What a great game!
I missed one secret, I don't know which one yet, since apparently on my maps I haven't signaled 3 or 4 of them.
I've also used some tips from this board about the puzzles, and in the case of the last level even the walkthrough, as I was too scared by the final boss.
All in all I guess that the 90% of the secrets I've found without help, and I'm pretty happy abut having figured by myself the hall of fire area and secrets.
I've grinded a bit there too, backtracking from lover levels, to get enough points in armor for my axe fighter to stand the fighter challenge and later on, again just to round up my level score, and I had to do it there with the Uggardians/Snails/Legionaries as I lost sight of where the Ice lizards were escaped in the temple level so I could not farm them.
So I ended up with my two main fighters at level 16, and the rogue and mage at level 15 each, in only 25 hours. Not bad!