Individuals with intellectual and/or motor disabilities often face significant barriers in accessing digital games due to the limitations of standard input devices – like keyboard or mouse – and the high cost of commercially accessible alternatives. To address this gap, this practical applied project presents the diPlayController, a novel, low-cost, and modular physical interface designed for accessible digital gameplay. Developed collaboratively within an academic and research context using Fab Lab technologies, the diPlayController offers adjustable buttons and customizable mapping software, serving as a viable keyboard replacement. This paper details the controller’s design and technical specifications, and reports on a crucial validation phase: assessing its viability from the perspective of occupational therapists. Through iterative testing in two institutions, the study identified practical challenges related to installation, mapping and button reliability. Crucially, therapist feedback directly shaped design improvements, including the development of a comprehensive visual manual and physical adjustments to the button caps. Results indicate that these changes significantly improved the controller’s practical usability for professionals. This successful evaluation of the controller’s viability by therapists validates the diPlayController as a promising and socially relevant physical interface design solution, paving the way for subsequent usability studies with the target population.