The Hack (computer game) reference article from the English Wikipedia on 24-Apr-2004
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Hack (computer game)

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Hack is a roguelike computer game originally written in 1985 by Jay Fenlason with the assistance of Kenny Woodland, Mike Thome, and Jon Payne.

Hack was an improved version of the Rogue computer game. It introduced character classes, pets, and shops as additional gameplay elements and expanded available lists of monsters, items, and spells.

See also: NetHack