Kingdom of Ninja 6 Home Kingdom of Ninja 6 0.0 / 5 ( 0 votes ) Your Rating? Discover Kingdom of Ninja 6 – Play Free Now on GameHard! In the 6 series of the kingdom of ninja game, survival awaits you in a dark dungeon covered with lava. Be careful monsters obstacles are everywhere. watch out for the sharp bladed wheels, they can injure you jump over the obstacles and reach the chest, complete the level. Categories in which Kingdom of Ninja 6 is included: Running 1 Player