Of the two games, Amun-Re and Löwenherz, which game was published in 2003?
Amun-Re (board game) Amun-Re is a game designed by Reiner Knizia and first published in 2003 by Hans im Glück in German and in English by Rio Grande Games.
Arcana Unearthed Arcana Unearthed (properly Monte Cook's Arcana Unearthed, ISBN  ) 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.)