things i miss from the original are ;
On the 64 version shooting lights would visibly darken the area. a small detail and probably very easy to code into a game.
shooting an unsuspecting guard up the jacksy on the 64 would result in a comical chuckle brothers hop.
say no more
the mystery island
gazing at the mystery island at the far side of the dam and wondering why it was there, could you get to it
one in each crossed over hand, John Woo style