'Lithic
As usual Jeff put up another post that stirred a disused corner of my imagination: Cave man days, through the lens of a D&D fork. This is something I used to give a lot of thought to back in the day. GURPS Ice Age seemed like such a neat idea, but I didn't love the system and couldn't figure out what to do for adventures (Fighting wolves and tribes all the time? Hunting a lot?). Acquisition of non-subsistence stuff isn't typically a big part of the caveman way of life. One possibility would be tribesmen stumbling across Lovecraftian horrors, but I had doubts about losing player interest while trying to build a backdrop of normalcy before contrasting it with the first unnatural discovery. Another thought was contrasting current neolithic era with finds of lost pre-existing civilizations of human or inhuman origin. It's an idea I like, and I think it could work well used appropriately. The Lithic setting wouldn't really work as a part of the same...