Halo multiplayer map pack consists of the downloadable maps for the game halo 2.
If you don't want to purchase the halo maps online you can buy this pack. It contains all of the nine downloadable multiplayer maps you need to play halo two online. It also contains the behind the scenes video documentary about how the maps are created. Also included is a nice animated short which gives you some insight into the story of halo.
It will also give you footage of the halo game when it was in development this is interesting to see. Now it is not really worth buying these maps on the disc as you can get them on Xbox live for free the extra videos by interesting but not worth paying much for.
You should be able to buy this very cheaply from around 1 to 5 pounds, if you are a big fan of halo it might be worth picking up.