Slain.io unblocked game is available for you to play free online against multiple opponents at school. You will engage a combat and use the punch to beat everybody surrounding. Try to survive as long as possible until you dominate the arena! Remember to fill the experience bar to improve nine trainable stats by collecting the passively generating orbs scattered throughout the map or killing NPCs with the enemy! Also, unlock the higher level and rank up. Let's start to explore the challenge in your way!