Real zombies are attacking a screening of Zombocalypse. The main need of the game is to protect the audience. Use the mouse of the computer to move, use left mouse click to help Mordecai attack and spacebar to help Rigby attack. The side scrolling game has time limit and you must try to earn maximum scores and protect the audience each night. Each new night is going to be a tough night but the heroes are determined and they are not going to make life easy for the evil attacking zombies. Getting into position in the right time is the most important part of the game. Regular Show: Nightmare-athon is one of our many Action Games that we publish on TheGamerStop.com. This game is also tagged as a Regular Show game. Click the play button to start having fun. To play even more free games, view our popular and new games page. If you want to play more games like this, then you can simply check out the games inside the game tags that are the most relevant to your interests or the Action Games category or the games like this game page at the end of the game tags.