No Game No Life

The story of No Game, No Life centers around Sora and Shiro, a brother and sister whose reputations as brilliant NEET (Not in Education, Employment, or Training) hikikomori (shut-in) gamers have spawned urban legends all over the Internet. These two gamers even consider the real world as just another "crappy game."

One day, they are summoned to another world where a young boy named Tet appears before them, claiming to be the “God” of this world. In this world populated by magical creatures, violence is forbidden, humanity is on the brink of extinction and all matters are settled through games. Using their combined intellect, questionable morals and considerable guile, it is up to these siblings to swindle their way to the top in a series of increasingly intriguing and deceptively deadly games.

(Source: Anime News Network)