Many video games have featured a day/night cycle that affects the gameplay in some way – for example, recent Pokémon games have used an internal clock to tell whether it should be light or dark and changed the game’s settings to match it. The Gameboy Advance title Boktai took this idea one step further by including a light sensor on the cartridge that affected the strength of the game’s vampire enemies. Many gamers were tempted to play only in bright sunlight.

Guinness World Records Gamers’ Edition 2009.