Check out my Prototype 2 (HD) Walkthrough !
Let's go out to the city and have ourselves a snack. Our Prototype 2 Walkthrough includes videos for finding collectibles, crushing enemies, and obtaining secrets.
Yellow Zone Collectibles
Yellow Zone is where you will spend your first few hours in the fantasy land called New York. You'll easily gain a full level from completing these objectives along with bonuses to Offensive, Locomotion, Defensive, and Predator.
There are only five Blackboxes in Oakhurst. The district is in the middle of the Yellow Zone and where you will start your adventure.
Fairview will introduce you to Field Ops where you will need to actively fight Blackwatch and Gentek.
Linden Park has fewer Ops than Fairview, but also includes the first Lair. You can find this infected zone towards the ending events of the Yellow Zone. Until that point in time you can ignore the Lair objective marker.