One of Those Haikyuu Headcanon Books

Mobile Games (and who plays them)

Crossy Road:
Oikawa, Daichi, Nishinoya, Tanaka, Lev

Neko Atsume:
Hinata, Bokuto, Iwaizumi, Kuroo, Yamaguchi, Sugawara

Hearthstone:
Tsukishima, Akaashi, Asahi (surprise), Ennoshita

Clash of Clans:
Terushima, Kinoshita, Narita

Clash Royale:
Just Kageyama because he's a lonely lil nugget XD (also he won't ever admit it but it feels nice to have something to rule over)

Everything (Except Clash of Clans):
Kenma, because he's Kenma