Play Gun mayhem 2 unblocked game as a really entertaining challenge in iO games unblocked. Name your avatar and customize what it looks like. Select a hat, weapon, face and shirt for your avatar. You also have a chance to add a single power-ups on PERKS menu where you name it. Move with arrows, fire with Z key and drop a TNT for X key. Some power-ups will appear on screen such as new weapons, extra man etc. By using these, you need to drop your opponent off the platform over and over again until it gets out of lives. Remember that you can play it as a multiplayer battle as well.