Killer.io is a classic free-for-all io game. In which, you play online like a maniac. Roam throughout the area and always prepare for stabbing opponents! Try to score the highest kills if you want to conquer the leaderboard in Killer.io unblocked! Remember to follow tips and tricks available at the start in order to accomplish your plans excellently! Survive, increase your points and avoid being caught or you will lose immediately! Connect to the room and show your abilities now! Good luck!