In an E3 interview with Konami today, the company shed some light on its upcoming action-RPG title for the Nintendo DS, Lunar Knights. Similar to the Boktai series on the Game Boy Advance, (which was also helped along by Hideo Kojima), players traverse a top-down environment "in a desperate world ruled by vampires," as the game's opening trailer describes.

Like Boktai, weather is a central part of Lunar Knights. Between hours of vampire- and demon-slayin', players will have to pay attention to the local forecast, as the DS's top screen provides a real-time view of the sun and moon cycles throughout the game. As the sun rises or the moon is eclipsed by clouds, the characters will be affected, though Konami didn't specify how.

A company executive did mention that switching between the game's two characters (Aaron the gun-wielding sharpshooter, and Lucian, the melee specialist), will play heavily into the light-scheme, as one character excels at combat during the day, and the other in the evening. Likewise, we know that the environments that the player can access and the monsters you'll encounter change as the sun and moon drift about the sky.

Look for more news in the coming months on Lunar Knights, as Konami specified a probable November release.