I posted about this in the forums too, but I wanted to put it here as well.

Why can't games put swimming features in? I don't know how many times I'll be playing GTA III or Mercenaries and somehow end up in the water. In Mercenaries, you're the greatest soldiers around and you can't even swim. Ya right! And sometimes it happens when you've done a lot and haven't saved. I think San Andreas has swimming, but thats just one game. Many more need to follow suit.