A fictional corporation in
White Wolf's
World of Darkness roleplaying games. It is both
mammoth and
corrupt; it is dedicated to the destruction of the
environment, the extinction of the
Garou, and the eventual
enslavement of
humanity. It manufactures products ranging from
fertilizer to
action figures to
fast food to
roleplaying games. Each of its products, in some way, contribute to the
supernatural decay of the
human species. The action figures it sells, for instance, are made with a
plastic which affects developing
nervous systems, such as those found in
children -- giving those children more
violent tendencies. Pentex is one of the most powerful tools of the
Wyrm and the
Weaver.
That said, I would hasten to point out that while admittedly many aspects of the World of Darkness line of games have strong anti-corporate and anti-technological sentiments, they by no means say that all corporations and all technologies are bad. But some -- like Pentex -- are corrupt, just as some corporations in the WoD are benificent. They're realistic about it. Pentex just happens to be a major antagonist.
Frighteningly enough, in the real world, Pentex Incorporated is a munitions manufacturer based near Seattle, WA.