For decades, arcade game machines have been icons of entertainment, but their technology requires updates to fix bugs, add features, and enhance security. Unlike modern consoles, the update process for arcades is highly varied, depending heavily on the machine's era and original design.

Historically, most arcade games from the 80s and 90s used ROM (Read-Only Memory) chips stored on the game's main PCB (Printed Circuit Board). Updating the game's software or firmware meant physically replacing these chips—a task for a skilled technician. This involved opening the cabinet, carefully extracting the old chips, and inserting new, pre-programmed ones obtained from the manufacturer. This method was permanent but time-consuming and required physical access.

As technology advanced, some systems began using storage media like CD-ROMs, DVD-ROMs, or compact flash cards. This allowed for slightly easier updates by swapping out the disc or card, though it still required a visit to each machine. For example, the Sega NAOMI and Chihiro systems often used GD-ROMs.

The modern era has introduced more networked solutions. Contemporary arcade machines, particularly those connected to the internet like those from Raw Thrills or similar manufacturers, can receive updates remotely. Operators can download update packages to a USB drive from a developer portal and then manually plug it into the machine's USB port to initiate the process. Some very recent and connected cabinets may even support secure over-the-internet (OTA) updates, where the machine downloads and installs patches automatically, similar to a home console. This is especially critical for online-enabled games requiring anti-cheat and security patches.

Beyond the game itself, other firmware updates might target peripheral hardware, such as bill validators, ticket dispensers, or card readers, ensuring compatibility and reliability.

Security remains a paramount concern. Manufacturers use encrypted files and secure boot processes to prevent unauthorized modifications or piracy. The entire update system is designed to be robust, ensuring that these expensive machines remain operational, secure, and entertaining for years on end.