A four level scenario that has some great construction ideas. The ammo placement is great, but beware!! Like all of Bungie games, conserve, conserve and conserve. The first two levels were better IMO that the last. I played this one all day and was stuck on the second level forever!! I finally came off of TC (which I forgot I was set on) and made it through. Great monster placement, some dead ends and some crafty puzzles that you will have to figure out to get through this set. A couple of the levels were giant and at times seemed to just ramble, but every time I felt this way, here came t...