If having a reference to cryptocurrency in the name title is something that is wanted. I would suggest to stay away from any name that has HIVE or any other specfic currency in it as to avoid any future blockchain issues that might arise in your ongoing progress with the game. A more general crypto name would be better way to go as it includes all chains.

CryptoKnights

KnightsFights

Knights

Battle Of The Knights

War Of The Knights

Knights Warfare

Knights Attack

KnightWars