The monster has stolen a rare powerful weapon from the underground museum. Now your mission is to find the monster and recapture the weapon back! This is not easy, but it is an exciting adventurous trip and challenge. Mario vs Monsters is a terrific game which you can play for free in in friv99.com. With Mario vs Monsters game, we supply many cool Friv 99 games to play at no cost.

Use WASD button/Use Arrow keys button to Move, Use Mouse button to Aim/Shoot,

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