Dead Air (L4D1)
| Map | Name | Difficulty | Time |
|---|
| (Co-op) l4d_airport05_runway | Huey Duck | Advanced | 7.59 minutes |
| (Co-op) l4d_airport05_runway | Huey Duck | Normal | 7.73 minutes |
Blood Harvest (L4D1)
| Map | Name | Difficulty | Time |
|---|
| (Co-op) l4d_farm01_hilltop | Huey Duck | Advanced | 2.60 minutes |
| (Co-op) l4d_farm02_traintunnel | Huey Duck | Advanced | 5.53 minutes |
| (Co-op) l4d_farm04_barn | Huey Duck | Normal | 7.65 minutes |
Custom Maps
| Map | Name | Difficulty | Time |
|---|
| (Co-op) l4d_airport05_runway | Huey Duck | Advanced | 7.59 minutes |
| (Co-op) l4d_airport05_runway | Huey Duck | Normal | 7.73 minutes |
| (Co-op) l4d_farm01_hilltop | Huey Duck | Advanced | 2.60 minutes |
| (Co-op) l4d_farm02_traintunnel | Huey Duck | Advanced | 5.53 minutes |
| (Co-op) l4d_farm04_barn | Huey Duck | Normal | 7.65 minutes |