The name is intentionally made ambiguous by the developers, but they acknowledge that the original ideas for names were something similar to "Automated Roaming Cannon" or "Automated Roving Cannon".
Was the name of my first clan more than 10 years ago with a group of friends in Starcraft: Brood War. "Anarchy,Revolution,Communism". Yeah... its a lol . [ARC] forever
Its funny to see ARC's in NS2 as a weapon and top EU clan Archaea "[ARC]" ^^
It used to be named MASC (Mobile Automated Siege Cannon) but that was too close to MAC so they changed it to ARC but they didn't think of a name for ARC first.
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source: http://wiki.unknownworlds.com/index.php/ARC
Its funny to see ARC's in NS2 as a weapon and top EU clan Archaea "[ARC]" ^^
(go look it up, links being stupid)