Level 13 Extinction Event
        
1. After the cut scene, jump off the statue onto the second floor and proceed 
   into the next room ahead.

2. There will be doorway with a portcullis up or closed depending on how fast 
   you approach, on the right side. If you move slowly you will miss the 
   police chief.

3. Proceed through the doorway with the portcullis. 
   
        

Bonus mission: Kill the police chief to obtain alternate costume.

        
4. Once through, climb the stairs to the next floor above, and then one more 
   time to the next floor.

5. There will be a balcony opposite the stairs.  Jump down from the balcony 
   and proceed straight and lift up the portcullis.