This page contains Left 4 Dead Hints for PC - Windows called "Unbreakable door" and has been posted or updated on Oct 14, 2009 by Christine2011. Let us know what you think of this Hint by thumbs voting.
If you are low on health and need somewhere to hide, find a bathroom stall. Go inside the stall and close the door. The door never breaks down. This works well if you are trying to heal yourself.
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