Dead Air (L4D1)
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_airport03_garage | Chemical (K-Cl-O4) (Perclorato) | Normal | 14.91 minutes |
| (Co-op) l4d_airport04_terminal | Chemical (K-Cl-O4) (Perclorato) | Normal | 11.60 minutes |
| (Co-op) l4d_airport05_runway | Chemical (K-Cl-O4) (Perclorato) | Normal | 10.20 minutes |
Custom Maps
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_airport03_garage | Chemical (K-Cl-O4) (Perclorato) | Normal | 14.91 minutes |
| (Co-op) l4d_airport04_terminal | Chemical (K-Cl-O4) (Perclorato) | Normal | 11.60 minutes |
| (Co-op) l4d_airport05_runway | Chemical (K-Cl-O4) (Perclorato) | Normal | 10.20 minutes |