In this short clip we get an peek of Nessus and it's environment.
~[i]TheGreatNike[/i]
-
From what it looks, the map seems to be large enough. If all the other planets are as big or bigger I may be satisfied with the free roaming side of the game, so long as their isn't any giant empty spaces anyways, like the ones on the moon and mars for example. I hate those areas, they make me cry.