You get a ton of end-mission notifications (and there are some campaign DLC's that show up when you start the game- but you'll see what I mean when you purchase it and play). all the DLC's activate (other than the HD texture pack- you can toggle that in your game settings) after you finish the beginning missions and obtain your apartment. The package info in the store page gives you the wrong information, and like I said, I don't know why. and it turns out that I actually have all of the DLC and they work perfectly in-game (all of them, even the unlisted ones- of course. I counted the contents of both of them to decide which one I want and I went with The Collection in the end because it was cheaper and I figured the extra $2 wasn't worth it for some DLC's. I also purchased the Sleeping Dogs Collection which only lists 17 of the DLC's, and I was given all of them other than the free HD texture pack that you have to download seperately anyways. Just to clarify and let other people know who view this forum.
