does the update happen automatically on steam or do I have to do?

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Double Post Merge: October 16, 2014, 02:08:25 am

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i recently bought this game 3 weeks ago

I have the steam version i tried off zommod site first then the the ugx manager and nothing and its only 5 maps that dont work the other maps do

hello I'm LostBoyNinja and I downloaded a few maps from the UGX map manager and they wont load from my mod menu. I could use a little help please and thank you