No Mercy
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_hospital02_subway |  Undead Mermaid | Advanced | 5.71 minutes |
| (Co-op) l4d_hospital03_sewers | Undead Mermaid | Advanced | 7.20 minutes |
| (Co-op) l4d_hospital04_interior | Undead Mermaid | Advanced | 5.94 minutes |
Dead Air
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_airport04_terminal | Undead Mermaid | Expert | 11.22 minutes |
| (Co-op) l4d_airport05_runway | Undead Mermaid | Expert | 7.88 minutes |
Blood Harvest
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_farm02_traintunnel | Undead Mermaid | Expert | 9.24 minutes |
| (Co-op) l4d_farm03_bridge | Undead Mermaid | Expert | 7.13 minutes |
| (Co-op) l4d_farm04_barn | Undead Mermaid | Expert | 7.46 minutes |
| (Co-op) l4d_farm05_cornfield | Undead Mermaid | Expert | 9.76 minutes |
Custom Maps
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_fallen02_trenches | Undead Mermaid | Expert | 17.01 minutes |
