Dead Air
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_airport01_greenhouse |  4_is_average_ | Expert | 2.69 minutes |
| (Co-op) l4d_airport02_offices | 4_is_average_ | Expert | 10.17 minutes |
| (Co-op) l4d_airport03_garage | 4_is_average_ | Expert | 11.24 minutes |
| (Co-op) l4d_airport04_terminal | 4_is_average_ | Expert | 8.03 minutes |
