itch.io

For the driders, you need to research monster breeding, after that you can build a breeding pit. You will be introduced to a new servant, Draith, who will take care of the driders and who will raise the drider eggs that you can get at various places on the map

You need to seek an alliance with the orc camp in the far north west of the map. It will take several turns revisiting camp this to finally get it, and for this you need to free/corrupt/convince the noble woman Delane for anything to happen (explore the camp a few times and you'll find her location). This is the only requirement for not getting a game over at turn 60 I believe