It’s Halloween time so hollow out your pumpkin and make it a scary one!. Halloween Mayhem is a fun and addictive arcade puzzle game that is a must have for this spooky season. The rules are very simple: To earn points eliminate 3 or more monsters. Monsters can be eliminated either horizontally, vertically or at angles. When eliminating more than 3 monsters, an extra second is awarded to your timer for every extra monster you get.