This is a game like no other: The intensity of the light outside affects the way the game plays by way of a built-in sunlight sensor. When the sensor is picking up sunlight in the real world and your character is outside or under a skylight, your Solar Gun recharges, giving you the energy to stun and defeat enemies.

The sunlight also affects the behavior of some of the game's traps and devices, and keeps some enemies away until the sun goes down and you go inside.

If you're locked in a dark dungeon, you can get limited weapon recharges at Solar Stations or by consuming Solar Nuts.

In addition to the sunlight gimmick, the game also employs stealth elements. By avoiding enemies, you can get farther into the game's castles, bogs and caves without using your weapon's charge. Icons appear above enemies' heads to let you know if the have spotted you.

The story is strong fantasy, dealing with serious world events and the secrets of Django's vampire-hunting family. The graphics are detailed.