Superhero.io unblocked game seems like a regular battle royale game in iO games servers. Well, it is in deed. The difference is about avatars used by online players. Hulk, Spiderman, Wolverine, Ironman and many more superheroes are battling in this cruel arena with their specialized weapons. The most suitable weapon for a sword battle like this belongs to Thor who has a hammer as you know. Beginning levels are easier to upgrade relatively. As your level gets higher, you need to kill more enemies for a level up. Move by scrolling mouse and hit LMB for a strike with your current weapon. The quicker side wins the battle and kills the other.