Arcade machines, both classic and modern, represent significant financial investments for arcade owners and collectors. Protecting these valuable assets from theft and vandalism is paramount. A multi-layered security approach is most effective, combining physical barriers with electronic monitoring. Here are the most common types of arcade machine anti-theft mechanisms employed today.

1. Coin Door and Cash Box Locks: This is the first and most fundamental line of defense. Virtually every arcade machine features a locked coin door, typically secured with high-security tubular locks or cam locks. These prevent unauthorized access to the coin box, which is the most immediate target for thieves. More advanced systems may use magnetic locks or even electronic locks with keypad or RFID access for staff.

2. Cabinet Anchoring Systems: To prevent the entire machine from being stolen, heavy-duty anchor bolts or security brackets are used to secure the cabinet to the floor or wall. This is especially crucial for lighter-weight cabinets or locations with high foot traffic. These anchors are often installed through the cabinet's base or back panel into concrete flooring for maximum strength.

3. Internal Alarm Systems: Many modern machines or aftermarket security kits include internal sensors. These can be tilt sensors that trigger a loud alarm if the machine is moved or tampered with. Microswitches can also be installed on doors and panels to detect unauthorized opening, sending an alert to a central monitoring system or sounding a local alarm.

4. Security Cables for Internal Components: To protect high-value internal parts like the PCB (Printed Circuit Board), monitor, or computer system, security cables are often used. These thick, steel cables are looped through securing points on the components and locked to the cabinet's internal frame. This makes it extremely difficult for a thief to quickly remove and steal the core electronics.

5. Surveillance and Monitoring: While not a physical mechanism on the machine itself, the overall security environment is critical. Positioning arcade machines within view of security cameras acts as a powerful deterrent. Additionally, placing machines in well-lit, high-visibility areas of an arcade reduces the opportunity for theft.

In conclusion, a combination of robust coin box locks, physical anchoring, internal alarms, and component cabling, supported by a secure environment, provides the best protection for arcade machines against theft.