No Mercy
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_hospital02_subway |  SnowBuried | Normal | 10.38 minutes |
| (Co-op) l4d_hospital03_sewers | SnowBuried | Normal | 11.56 minutes |
| (Co-op) l4d_hospital04_interior | SnowBuried | Normal | 7.73 minutes |
| (Co-op) l4d_hospital05_rooftop | SnowBuried | Normal | 8.63 minutes |
Dead Air
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_airport01_greenhouse | SnowBuried | Advanced | 3.67 minutes |
| (Co-op) l4d_airport02_offices | SnowBuried | Advanced | 11.24 minutes |
| (Co-op) l4d_airport03_garage | SnowBuried | Advanced | 9.86 minutes |
| (Co-op) l4d_airport04_terminal | SnowBuried | Advanced | 7.36 minutes |
| (Co-op) l4d_airport05_runway | SnowBuried | Advanced | 5.91 minutes |
