Outcast's Path

On the farm, I killed everyone(( but who else couldn't I kill?
Now I can already complete the main quest (76 reputation).
And I also found the blueprints.
And I also read somewhere that there's some quest about repairing a portal, and that cyclops are grumbling about something, someone wrote that they killed the cyclops.
Where are these quests? Who do I get them from?

The quest to repair the portal is given in one of the centaur buildings in the orc city.

Regarding the quest with the cyclops - it depends on which path you chose. If you handed over the spy to the orcs, then it's one thing. But if you decided to help the spy eliminate the prisoner guards, then that's when you have to kill the cyclops.

One of the quests for the orcs is given by the chief of the cyclops guard, offering to help him guard the prisoner camp.