"Drakengard, known in Japan as Drag-On Dragoon (ドラッグオンドラグーン, Doragguon Doragūn), is a PlayStation 2 role playing game developed by cavia and published by Square Enix and Take Two Interactive.
Drakengard features ground missions, aerial missions, and Free Expedition Mode. It also has two difficulty modes, which are Easy and Normal. The player does not need to erase the game and start over for any reason whatsoever. It is optional to go back to an earlier chapter or verse if the player has missed something. In Drakengard the dragon gains greater attack power as it gains experience and levels up. At certain points of the story the dragon evolves into a different, more powerful form, which enhances the dragons attack powers, magical attacks and allows to lock on to more enemies.
Drakengard is divided into chapters and subdivided into verses. Missions numbered with Roman numerals lead to endings other than the one merited in Chapter 8, and can only be played if the player meets certain requirements. The Game has four additional alternate endings. Each of these endings, along with the canonical ending, are achieved by certain events in the game. The first ending deals with Furiae resurrected by Inuart using a Seed of Destruction, and then the second has Angelus revoking her pact with Caim and fighting him to the death. The last two deal with the Grotesqueries revealing themselves and the "world of the gods", Tokyo, is shown in one of them. These last two are used in the sequel to explain the true nature of the world of Drakengard and the Grotesqueries themselves."
Source: Wikipedia, "Drakengard," available under the CC-BY-SA License.