LOL I dont know the game per se' but I must have seen it somewhere. Excuse me for being an idiot right now but WHAT were you trying to achieve with the curve and surface...sorry mate I am slow sometimes....looking at your images I 'assume' you were teying to do someting with the tunnel entrance (cone) or the bridge??
I am curious about this little error thing you had going...
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes