nothing tbh just complete the other routes but if you want to find alynn again just go to the sunshine town infront of lucky night aka the brothel you'll find him he'll tell you that he will help you find the pyramid and stuff it's not available YET. Then in the entrance of sunshine city aka infront of the oasis they will be a person beside the guards this person is apparently a part of a research site just agree to it then you will get a map follow the direction and go there will Sonia a major character if you accept her offer to lay sandworm eggs you get an end of smth i don't remember so yeah but if you deny it..well idk never tried it. Hope this helped !
Before this whole line with the gold mine, you can take part in an auction and buy a slave girl. But for this you need to have 100,000 credits. In addition, it is not yet clear why you need to do this - there is no development of events later.
Another possible option - to become a slave to King Sauel - has not yet been implemented.
I can also say that the game was supposed to give two more options: 1) kidnap Don with the help of Arlene and hand him over to Sonya for her strange experiments with worms (probably a bad ending); 2) persuade Sonya to take part in her own experiment as a guinea pig. Whether this will be implemented - I do not know.