Back at the height of the “Golden Age of Gaming”, clever players found ways to cheat the arcade system – to the anger of arcade operators. Come to think of it, methods used could have been considered a very early form of piracy since players were getting games for free but that didn’t last terribly long as manufacturers were quick to resolve the problem by making the coin mechs more complicated. They had to come up with a number of fixes, including the prevention of pennies or nickels giving a credit, a quarter on a string, slam sensors and more. Those anti-cheating methods were documents and one website has posted a number of these documents up for viewing. While I have some experience with coin mechs themselves, I never looked much into how they can prevent cheating.