Well basically, you evolve your creature, from a micro-organism, to a basic land creature, then you try to make it sentient, which is when it becomes like a RTS, your creatures form a tribe, later they become civilized and build cities. THEN... you go into space, exploring solar systems, galaxies, trading, conquering, colonizing ect. ALL THAT... starting from a tiny organism trying to survive in a cesspool filled with things trying to eat you XD
its epic... you basically play how you want :P if you like creating stuff, then you would definitely love it.