No Mercy
| Map | Name | Difficulty | Time |
|---|---|---|---|
| (Co-op) l4d_hospital01_apartment |  How to back flip? | Advanced | 6.44 minutes |
| (Co-op) l4d_hospital01_apartment | How to back flip? | Normal | 2.61 minutes |
| (Co-op) l4d_hospital02_subway | How to back flip? | Normal | 5.46 minutes |
| (Co-op) l4d_hospital03_sewers | How to back flip? | Normal | 5.94 minutes |
| (Co-op) l4d_hospital04_interior | How to back flip? | Normal | 5.11 minutes |
