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This is a remake of id's doom2 map01. I decided to make this after playing doom3 Entryway for several weeks. However, I soon realized that it was impossible to make a really good remake of it for doom3 without doing any major changes... So, there is now an all new Security Checkpoint; I also removed most of classic secrets and made several new ones.The map looks like a small Mars base invaded by hellish forces. You are dropped there to clean it.