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