Unlike the previous areas you have explored, Linden Park includes one hidden Lair, four Blackboxes and three Field Ops.
In fact, in Linden Park you will find the first Lair in Prototype 2.
Make sure you collect every Blackbox in Linden Park to unlock a new offensive mutation for Heller, and then find all Field Ops to unlock a new defensive mutation.
Dont leave Linden Park without destroying the Lair, because you will miss a very important predator mutation.
To locate all Prototype 2 collectibles in Linden Park, use the coordinates below.
When you enter the Lair, follow the objectives that appear on your screen and clear it, by killing all enemies.
After you find all collectibles in the Yellow Zone, progress through the games main missions, and finish all //Blacknet side-missions.
Use one of the Airbridges in Oakhurst or Fairview, to travel to Salt Yard Plains in the Green Zone.
Linden Park Blackboxes Coordinates
Blackbox #10 74, 1460
Blackbox #11 158, 1464
Blackbox #12 490, 1399
Blackbox #13 420, 1286
Linden Park Field Ops Coordinates
Field Op #5 385, 1511
Field Op #6 425, 1408
Field Op #7 41, 2540
Linden Park Lair Coordinates
Lair # 1 406,1339