Arcade game developers create games with modifiable rulesets by leveraging flexible design frameworks and modular programming techniques. The process begins with a core game engine that supports dynamic rule adjustments, allowing developers to tweak gameplay mechanics without rewriting entire codebases.

Key methods include:

1. Scripting Systems: Using Lua or Python scripts to separate rules from core logic, enabling easy updates.

2. Data-Driven Design: Storing rules in external files (JSON/XML) for quick modifications.

3. Modular Architecture: Building games with interchangeable components for seamless rule swaps.

4. Player Customization Tools: Providing in-game editors or modding support for user-generated rulesets.

Developers also employ playtesting and iterative design to ensure modified rulesets remain balanced and engaging. Modern arcade games often incorporate cloud-based updates, allowing real-time ruleset adjustments post-launch. This approach keeps gameplay fresh while reducing development overhead for new variants.