Tom Clancy's Rainbow Six Vegas 2 Tips
Go to Kill House on Terrorist hunt. Use a shotgun. Immediately climb the stairs halfway. Go to your right around the corner of the building while on the walkway. There should be a crate. Approach it and crouch on the side you approach it from. Enemies should begin to descend the rope nearest to the crate. Shoot them either on the rope for marksman points, or at the bottom for CQB points. Either way, enemy bodies will pile up at the bottom of the rope, and it looks funny. You can win the whole level this way. Just keep your sights trained on the corner you first came around to take care of sneaky enemies, and listen for enemies on the rappel. Every once in a while stand up and shoot any enemies that may be on the other side of the crate. I did this on casual with low enemy density.