Freeware releaseThe registered version of Xargon was released as freeware by its author, Allen W. Pilgrim, alongside Kiloblaster on August 4, 2008. The source code of both games was also released to the public.
The Xargon series is collectively titled "The Mystery of the Blue Builders"
In chapter two and three, which is NOT shareware, if you goto the second page of the credits from the main menu, it says "This game is shareware. Please give a copy to all your friends." So they're encouraging us to pirate it!