A few months into the merger between Square and Enix, Square had not yet begun to fall out of the good graces of many of its loyal fans. While they weren't the highly experimental Square of the 1990s, their catalog hardly consisted only of releases from flagship series Final Fantasy and Dragon Quest. Traditional JRPGs still reigned, but Square Enix had some notable action RPGs in their back catalog: Parasite Eve, Vagrant Story, and the Seiken Densetsu/Mana series (of which a remake of the first entry in the franchise had just released on the Game Boy Advance). 2003 would also see a new series added to that list: Drag-On Dragoon/Drakengard.
Drag-On Dragoon was developed by the Tokyo-based (and now disbanded) Cavia. They were a very young studio, and while this was not Cavia's first RPG (that honor belonged to a One Piece licensed game on the Game Boy Advance, "nanatsu shima no daihihou"), it was their first action game of any kind. So why would Square Enix publish a new action RPG property when they had plenty of other franchises they could pull from? This was meant from the start to be a dark RPG, unlike most of Square Enix's other properties. The story was written by Yoko Taro (who was also the game's director) and Natori Sawako, and is easily the highlight here despite being presented in a fairly bland manner for large chunks of time. The game's Japanese slogan was "抗え、最後まで" or "Resist until the very end".