A Himouto! Umaru-chan game has been announced for release on PlayStation Vita by FuRyu.
Details are scant at the moment, but the game will be called Himouto! Umaru-chan: Umaru Training Plan and will have the player helping Umaru-chan with the quality of her work in a training simulation type setting.
Himouto! Umaru-chan: Umaru Training Plan will be available in Japan sometime this Winter – with details very likely to follow between now and then. 😉