There was an urban legend that there was a legendary, undefeated gamer called [ ], but in reality he was just a NEET brother and sister named Sora and Shiro. These hikikomori siblings who both refer to the real world as a worthless "Kuso Game" are one day summoned to a different world by a boy calling himself "God". In this world, war is prohibited by God and everything is instead decided by a game...that's right, even country borders. Can the two NEET brother and sister save the last of the human race <Imanity>, which only has one city left?
I guess they're taking over for BT. Interesting. I saw their tweet that they will be picking up a new series, I hadn't checked back to see what it was. They did hint that there may be an imouto involved, hardly surprising.
How you feel about this series probably will depend on how you feel about ecchi. If you don't mind ecchi, you should like this. There is also some wincest simmering beneath the surface. It hasn't come out yet, but it's there. The plot is interesting, so are the characters, the games are smart and creative. Worth reading if you can get over some (at times unnecessary) ecchi, and possible wincest implications.