Arcana Unearthed (properly
Monte Cook's Arcana Unearthed, ISBN 1-58846-065-7) is a
role-playing game created by
Monte Cook and first published in 2003. Described as a "variant player's handbook", the 256-page hardcover core rulebook bears many similarities to the
Players Handbook of 3rd Edition
Dungeons & Dragons, on which Cook worked a few years prior. In terms of rules,
Arcana Unearthed is based on the
d20 system of
Dungeons & Dragons, although due to including rules for character advancement it cannot be an official d20 system product. (It does, however, use the
Open Gaming License.)