User blog comment:Chesha/Hello everybody!/@comment-4059927-20120623190026/@comment-3145713-20120630145131

Well, they followed a slightly different order and they had more content and dialogue which explains why the missions play out the way they do.

Like for example, the Prep mission "The Eggs"...some of the dialogue suggests that the meeting was meant to be a setup from the very beginning so that they can egg Jimmy. Or Weed Killer...originally you were supposed to beat up Tad and dunk his head in a toilet until he slips up and gives you the password to Harrington House.

There's a lot of other stuff too, including scrapped mini-games and side missions.