There's a non-human LI, Calypso, so that might be the only tag that applies. There are also "monsters" that show up in scenes (at Warthogs, on the Andromeda server, and a few other places), so those are in the game, but they aren't LI characters. Well, Alex has turned into a dinosaur once, so she can be a monster in Eternum. That could get kinky...
That is slightly simplistic. Creativity don't care about mainstream or not. If someone creative, who doesn't care about being mainstream or not, create a story with harem and incest, then it's creative, no matter if the kinks themselves are mainstream or not. Creativity is about treating the kinks in their own way, without pumping off others. It's more about how you do it than the kinks themselves.
Dudes, you're all getting very offtopic over my harmless pointer about harem and incest being mainstream in AVN's. Maybe we should go back to topic (the game Eternum). A little bit offtopic might be okay for the mods but this turns into a whole other conversation, and to be honest I don't see the reason to discuss this. Nothing wrong with mainstream and also not with making games for mainstream. Although I'll never get how incest could get such a major trope. Maybe it's just a vocal audience. I don't know, but that's also not the topic of this thread. So I'll just leave that topic unanswered now.
I guess this one...
