MobSmash.io is a pretty amazing new .io game in which you have to grow your mob and fight other players mobs, animals mobs and giant monsters all around the map! Start by attacking small packs of animals and weak ones, then as your mob grow, you will get stronger and you will stand a chance against big hordes. You will get XP & gold when you kill other players. You also have an ultimate ability that you can use once in a while, like speeding. Collect gold to buy new mobs.