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No Way Out

The survivors chrashed with their last helicopter out of the zombie apocalypse, and now they need to puzzle their way out from the city.

Enable Hints, (i thought i made enough hints back when i created this btw). Or search for a walkthrough if you don't understand. But basically you need to use gnomes alot and find and plant the C4 in the mess of MAP3
Don't expect this to be an average campaign.
Every map contains unique (buggy.. thanks source) puzzles and it ends with the survivors trapped in a saferoom (hence the title).

Campaign completed and not touched again since 12/30/2011

2011!!!! I wont touch this unless a l4d3 comes out. OR.. something new is coming