Btooom! (2012 )
Youre stuck on survival island until you gather 7 gems, and the only way to get gems is by killing other people
Outbreak Company (2013 )
Shinichi Kanou is a young secluded Otaku who is offered a job thanks to his vast knowledge of anime, video games and manga and just after meeting his new employer, he is kidnapped, awakening in an alternate world with a fantasy setup