Software documentation is crucial for arcade game machines to ensure smooth operation, maintenance, and troubleshooting. The most common practices include:

1. User Manuals: Detailed guides for operators, covering setup, controls, and basic troubleshooting.

2. Technical Specifications: Hardware and software requirements, compatibility notes, and system architecture.

3. API Documentation: For developers integrating or modifying game software, including SDKs and libraries.

4. Troubleshooting Guides: Step-by-step solutions for common errors, often with error codes and diagnostics.

5. Version Release Notes: Updates, bug fixes, and new features for each software version.

These practices help streamline maintenance, reduce downtime, and enhance the gaming experience for both operators and players.