Sapiens, without a doubt. I never could figure out how to shape stone weapons, and thus was a lousy caveman.
I totally played this, and I could even make a few stone crafted weapons, it had to deal with mouse button click duration I think simulating raising your hand and slamming it on the stone, outside that I never really understood about the game, like I never discern a purpose or direction for my existence.
I've played a few games, that are obscure unfortunately due to that, I don't remember their exact names. There was one on the Jaguar that was a lemming clone with cavemen instead with some worms thrown in with humor and gadgets. Nother game was on the SNES, with vikings and footballs. They would get into scuffles on the field and kill each other and there would be Elvis sighting in the after game report.
Cannon Fodder for the SNES.
Deadlock, was a TBS for PC/Mac a mid nineties release with limited commercial success, and the most awesome song (that you cannot find online. I dare you!), and had a sequel that wasnt commercially successful.
An old game, which had 13 in the title. Room 13, Hotel 13, it was a detective game, almost all text. I was 11 when I played, but I remember it being awesome and I would to track it down again. If this game rings a bell, I can provide a few more details on game play.
Edit: The title is Floor 13, in which you are the head of a spy service in England using any mean nessicary to keep the populace happy with the Prime Minster.