The challenge substitution principle is a framework for making games more accessible and for reaching a wider target audience I designed.

It focuses on replacing unwanted challenge with wanted challenge, creating adaptable skill floors, allowing players with disabilities to experience your game without the required physical skills.

The article focuses on the framework behind substitution and understanding the different types of substitution that can be provided, alongside understanding the benefits and cost of implementing the principle.

I created a theoretical application for Concentric Game Design to be used outside of game design by creating an abstract version that can be applied to any topic.