Games that take place in a prehistoric period?

I'm looking for games that take place in an ancient setting. Like, cave people or hunter gatherers or something. Dinosaurs may or may not be included (though obviously they didn't exist at the same time...). Any games in that setting? If we reach Rome, it's too recent. o_o

They can be for DOS, Windows, PS2, PS1, PS3, PSP, or really probably any platform except the PS4/X1. Windows or DOS is preferred for convenience, but ofc that's minor.

I kind of doubt any games in such a setting exist, but I find it interesting and my internet searches haven't revealed anything.