Lunar Knights, known in Japan as “Bokura no Taiyō: Django & Sabata” and abbreviated Boktai DS, is the fourth title in the Boktai series of games developed by Kojima Productions. The ultimate goal in Lunar Knights is to destroy a number of boss vampire enemies, in which the basic mission is to defeat each of them in their respective dungeons. [Info from Wikipedia]
In some of the old screens, we can see a couple differences in the beta-HUD: the feather and the energy bar (for Lucian) had a different color than the final version. In the original artwork, we can even see some unused or different character design. In the video, there are some odd parts: the sword of Lucian looks smaller than usual and the transformations dont have a time limit (probably it’s just not showed on-screen).