Wish I had time to read all the responses on all the threads on the mods (thank you, guys!).
Having figured out how to beat Lethice in that final battle, I've played through a couple of endings.
There's one that seems to be missing: You decide to stay in Mareth. After choosing to "Go Home" and not take over the Stronghold/Citadel, you spend time exploring the citadel - and its library. You find out that one of the demons figured out how to make a stable portal, and with the help of your followers, you create one that leads back to Ingnam.
NEW TEXT:
You could easily go home. But you've made many friends – and lovers – here. You even have children. Back home in Ingnam, you'd be a hero. And that place needs to be cleaned up and set to rights. But you owe them nothing, and here you've got people here who have come to rely on you. Do you go back to Ingnam and deal with those who sent you here, or stay at your new home?
Stay
Once Mitzi escaped the demon's influence, her head cleared. It turned out she had a knack for organization. Your collection of huts and tents was soon turned into a little village. Sturdy if simple dwellings, and a crude fence around it all. A well for fresh water, and even a watch tower that doubled as an aerie for Sophie's daughters. Isabella had planted a vegetable garden, and Rathazul and Arian teamed up to ensure bountiful crops free from vermin.
Mopping up the remaining demons kept you busy for a while, but after a few months, you could hang up your weapons and let the rest of the world take care of itself. You had a manor to look after, and running that was taking up more and more of your time. It called for a different set of skills, but with the help of your friends, you managed.
Keeping all your lovers happy and satisfied, however......