Viacom New Media
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"Hatman" is a recurring crude caricature of a Viacom New Media higher-up that the developers hated. Originating as paint graffiti of the person on a wall whose identity was disguised by putting a top hat on it, it soon made hidden appearances in the rest of the developer's output as an obligatory easter egg. The earliest known Hatman easter egg made for a game was a short CG animation for the game Beavis and Butt-Head in Virtual Stupidity.
Contributed by MehDeletingLater