Arcade machines have long been a target for exploiters seeking to manipulate games for unfair advantages or free plays. To combat this, manufacturers have implemented various anti-exploit mechanisms. Here are the most common types:

1. Hardware-Based Locks: Many arcade machines use physical security chips or tamper-proof casings to prevent unauthorized access to internal components. These locks deter hardware tampering and cheat devices.

2. Software Checksums: Games often include checksum verification to detect altered code or unauthorized modifications. If the checksum fails, the machine may reset or display an error.

3. Encrypted Communication: Modern arcade systems encrypt data between the game board and peripherals, making it harder to intercept or manipulate inputs.

4. Behavioral Monitoring: Some machines analyze player input patterns to detect unnatural behavior, such as rapid, repetitive actions indicative of macros or bots.

5. Time-Based Restrictions: To prevent exploit loops, arcade games may limit the number of plays within a set timeframe or require cooldown periods.

These mechanisms ensure fair play and protect the profitability of arcade operators while maintaining the integrity of the gaming experience.