I started Gorgon but hadn't finished the main game yet. So  I went back and finished the main game and tried to play Gorgn.   The game will not let me return to Gorgon.  It immediately goes to the Main game ending.  I cannot go back to Gorgon.  Help please. 

I didn't finished the main game, I only need to go tho tartaris but instead I went to gorgon. 
but now I am stuck because I don't get the preserved eye from lucky's safe

That eye is proving elusive for lots of people and so far nobody has offered a solution or workaround.

and why is obsidian not doing anything about it?
if so many people don't get that preserved eye, can't anyone get any further in the game?
to start a new game every time and then get stuck on that eye is not really fun.
have already started over 3 times and stuck 3 times because I don't get a preserved eye