Declassify Mission: More powerful locust resistance
You can activate the declassify mission in the starting area. Exit the hotel and proceed along the street. You should find a COG tag skull on the wall beside the stairs of the building to the right. Take the stairs and go around to the right to find the COG tag on the balcony.
As you move, you'll find serapede eggs scattered in the area. You can destroy them then proceed in opening the barricade gate. While you're opening it, a serapede will attack. As you're busy dealing with it, dark wretches and a corpser may join the fray.
Open the gate and you'll run into a patrol. You'll have to set up an ambush for that patrol. There are tripwire crossbows in the area. Use it to deploy tripwires on the street and along the stairs in your position. Once the timer expires, the section will be complete.