Boktai: The Sun is in Your Hand

Boktai: The Sun Is in Your Hand is an action-adventure role-playing video game released by Konami for the Game Boy Advance in 2003, and the first game in the Boktai series. The player takes the role of Django, a vampire hunter, who uses a weapon called the "Gun Del Sol" (Solar Gun), that fires bolts of sunlight at enemies. The game made novel use of a light sensor on the cartridge which encouraged playing parts of the game in direct sunlight. The game was produced and designed by Hideo Kojima.