The bunker_revised_310709_1748.zip file you have requested: Maps Levels Missions / Survival Maps / Left 4 Dead Survival Map Bunker Revisited - 2.69mb 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:
The mission file didn't work very well, so it can load on all 3 modes, but it's purely a survival map. Hold out in an underground bunker. This is a survival map, first version. Probably some glitches.