Whisky, a dog who can attract attention without any risk to himself, though he can only go so far away from his, uh, people. Natasha, a Russian similar to The Spy(except using feminine charm instead of the officer of a superior) who acts as a contact, as well.
More Commandos, and since next to nothing was missing, only a few. There are a ton of new additions: Weapons and equipment to use, such as Molotov cocktails, a flamethrower, and sleeping-gas grenades. This is one of the cases where they largely got away with it. This is one of those sequels where they, presumably in response to complaints that the original was overly difficult, made it less so(others include Hit-man, where the 2nd and 3rd were considerably easier than the first).