Grimrock

I finished it, found the key where the soldiers were at.

I did not know that you needed to blast fire after I had used the sword. Now I cannot get past that part, and have no fire to throw at the face. I have gotten all the keys but the one by the face where the fire needs to be thrown, even the blue orb, but find that the only way I can get to throw a ba...

I am stuck at the last gate, that is my problem, I have a gold key, but not sure where the last gray key is, as I cannot go through the gate.

Where is the 4th key, I saw that it is where you throw the fire, but I could be mistaken.

The problem is that I need the key where you do the fire ball at.

I find that it is not optional, please let me know.

I am stuck on the part where you have to throw the fire ball.

I cannot do the spell, do not have level 13.
I cannot use the fire sword, it is all out.

What can be done, and I have killed most of the enemies.

I inserted the first key right when I entered that roon.

I will look for a 3rd key.

tbg

Thanks for your help, any idea where that key was on the ground in a passage?

TBG

I got both brass keys for the blue crystal room, and inserted one on the left hand side, and one on the right hand side, and the door will not open so I can get in the portal.

I got the key from the bag, and the other one from the door on the right, so I have the right keys.

Please help