Here is a video from Rainbow Six Vegas 2 Walkthrough part 12 Convention in singleplayer in the North Hall. Vegas Act 4 Scene 3. In this North Hall scene I show Gameplay and how to finish the missions at realistic. At that point I have finish the campaign once on realistic.
For those that have doubt about the difficulty level, at realistic your crosshair don't turn red when you aim at the enemies, and you get 10 point for each kill you do and 5 point for each kill your friendly shoot.
So enjoy this Rainbow Six Vegas 2 Walkthrough part 13 Convention Act 4 scene 3 North Hall at realistic.