Dead Air
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_airport02_offices |  Dr. Knockdown | Advanced | 9.60 minutes |
| (Co-op) l4d_airport03_garage | Dr. Knockdown | Advanced | 7.40 minutes |
| (Co-op) l4d_airport04_terminal | Dr. Knockdown | Advanced | 6.18 minutes |
| (Co-op) l4d_airport05_runway | Dr. Knockdown | Advanced | 6.90 minutes |
