Slot machines are among the most profitable games on the floor for the house, the players, and the cheats. Due to the huge jackpots they can offer, slot machines are a battleground between people who try to cheat and those who run the machines.

Let’s look at some of the sleazy tactics that slot cheats have employed throughout the years. However, we never advise you to attempt them yourself!

1. Cheat code

A gambling authority’s purpose is to ensure that the gaming sector is run legally and fairly. Gaming machines are built by engineers to be monitored and audited while yet providing enjoyable gameplay.

That is what the notorious slot machine cheat Ronald Dale Harris, an engineer from the Nevada Gaming Commission, did. He was undoubtedly skilled at using a slot machine! He exploited machines for years by knowing the source codes. The scam wasn’t found until his companion struck it rich at the casino in 1995, winning $100,000 on a keno game.

2. Face coin cheat

Fake coins have also been used historically to cheat in slots. Louis “The Coin” Colavecchio, a con man, used fake coins to defraud casinos for years before his arrest in 1998.

After being freed in 2006, he promptly resumed his cheating. It only took a few months until he was once again cornered.

3. Magnet cheat

Since all of today’s slot machines are controlled by software, it is impossible to fool them with a magnet. On previous machines, though, it was possible to cheat with a magnet when they were constructed of metal.

You can use a magnet to cheat at slots by spinning the reels and using a powerful magnet on the machine’s exterior to stop it when you spot your winning combination. Cheaters would then take out the magnet and get their reward.

4. Light wand cheat

Tommy Glenn is one of the most infamous slot cheaters in gaming history for the light wand. The slot machine’s optical sensor, which determines how many coins have been placed into the machine, would be effectively blinded by the light wand. The light makes it impossible for the machine to decide when or how much to pay out.

It meant that Carmichael could use slot machine manipulation to his advantage by converting modest rewards into large ones.

5. Top-boundary joint cheat

It is among the sneakiest ways to cheat at slots and was often used by con artists in the 1970s and 1980s. They employed a unique device that was divided into two pieces, a top (a metal rod with a “Q”-shaped bend at the end) and a bottom (a long wire).

6. Bill device cheat

The bill device is a basic yet incredibly efficient slot machine trick. A little gadget is wrapped around a $1 bill to trick the slot machine to thinking it accepted $100.

7. Chip replacement cheat

With this concept, Dennis Nikrasch altered the slot machine cheating game. He spent money on a slot machine and experimented with it in his garage to discover its weaknesses. He found that reprogramming the computer chips within the machines to pay out jackpots was possible.

Nikrasch placed an order for a large quantity of these chips, engaged a group of con artists, obtained many slot machine keys, and began a fraud campaign that would drain casinos dry for years. He accomplished this by simply exchanging his altered chips for the independent ones.

8. Software cheat

For years, cheaters have used software bugs to their advantage. Players might confuse the machine and cause a bug that pays out the jackpot by playing a specific sequence of stakes and games.

Over the years, numerous slot machine fraudsters have benefitted from this, but today many jackpot winners are now losing their riches.

The most well-known event occurred in 2015 when 90-year-old grandma Pauline McKee of Illinois won $41 million at an Isle Casino Hotel Waterloo Miss Kitty slot machine.