On Friv Games Today we want to offer you some of the best Regular Show Games online on the internet, because we know that you want to have a lot of fun together with Mordecai and Rigby, with whom you can always go on all sorts of interesting adventures, just like this one in the game called Regular Show Nightmare-Athon, where you are about to play one of the greatest zombie games online! Everybody loves playing free zombie games online, which is why we have added this game, that we are next going to explain to you how to play. In this game, Mordecai and Rigby were attending a screening of Zombyapocalipse 3D, which was interrupted when real zombies have started attacking the audience. Only Mordecai and Rigby, with your help, will be able to help them survive. Zombies will be coming from the right side of the screen, and you have to attack them before they can reach the characters and the audience members. To stop them, you have to attack them using the mouse, with which you can move the characters, and attack with Mordecai, by throwing balls, bombs, and other sorts of projectiles. They, with the spacebar, you can use Rigby to attack. Do your best to destroy all the zombies in the game, and make sure you score as many points as possible!