The fortoctober_140909_2174.zip file you have requested: Maps Levels Missions / Survival Maps / Left 4 Dead Survival Map Fort October - 3.99mb is not available. Perhaps try browsing all files for the game Left 4 Dead and upload any files you want to share or are missing. This is the only information we could locate:
Military recruitment complex. There is a flaw in the VPK format that doesn't allow custom content. So, might be leaving this website soon. Nav Mesh is good now.