For C64. Early game, I guess.
Platform, you controlled a man (with a rainsuit, or something like that) going in caves under the surface of the earth, and there were dinosaurs and other funny stuff... I remember clearly that you climbed down walls, and could afford to "fall" from a wall to a lower one, if the height wasn't too much... and I remember something about dinosaur eggs, but I could be wrong...
Does anybody know the title of this game? The pirated version I played was something like "Mission in the centre of the Earth".