This Challenge tasks you with killing Stalkers. One place where you will undoubtedly find a good deal of Stalkers is the Wildlife Exploitation Preserve, as it will be the first enemy you encounter in the area.
- Rank 1: Kill 10 Stalkers
- Rank 2: Kill 25 Stalkers
- Rank 3: Kill 75 Stalkers
- Rank 4: Kill 150 Stalkers
- Rank 5: Kill 300 Stalkers