Ninjago Swamp-Arena Home Ninjago Swamp-Arena 0.0 / 5 ( 0 votes ) Your Rating? Discover Ninjago Swamp-Arena – Play Free Now on GameHard! Ninjago Swamp-Arena brings you to a battlefield with all coming waves of enemies that you must deal with. Cut them with your sword and dodge their attacks. Reach checkpoints and get boots in different spots of the location. Survive as long as possible to get points and have some fun! Categories in which Ninjago Swamp-Arena is included: Puzzle Matching 1 Player Thinking