XaberCat is the screen name of a small time hacker known throughout interstellar holoarcades for using a Predator as a fighter in The Lost Viking.
Whenever anyone comes close to equaling XaberCat's high scores on any of the games, they are often rewarded with a messages containing information on Government Conspiracies, Alien activities, and other articles. These are generally written off by most officials as ramblings of a troublemaker and should hardly be taken seriously.
Elusive in the extreme, some wonder if XaberCat is one or more hackers in separate systems. A few rumors across conspiracy hypernet sites even believe XaberCat to be either alien or possibly an A.I. in origin (Deus Ex - Human Revolution: Eliza Cassan). None of which can be proven.