How many people are playing Zombie Panic! Source right now?

Zombie Panic! Source has 34 players on Steam right now, with a 24-hour peak of 45 and an all-time peak of 748 on Jul 2012.

What is the all-time peak player count of Zombie Panic! Source?

748 concurrent players on Jul 2012.

Zombie Panic! Source was released on Steam on 3 Oct 2008.

Every achievement on record

106 achievements · 4 secret

Fighting for A Greater Cause
Complete any official objective map for the first time.
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A Survivor is Born
Survive any official survival map for the first time.
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Deep Blue
Complete Aquatica as a Survivor once.
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Get to da Choppa!
Complete Biotec as a Survivor once.