Rigor Mortis® is a web-based, multisensory reading app designed for the Windows operating system. It was created with the Unity 3D game engine (Editor Version 2021.3.38f1), comprising two components. The app’s backbone is The English Code Language Training System, an Orton-Gillingham-based language training system. The Orton-Gillingham approach is an intensive, sequential phonics-based system that teaches the basics of word formation before whole meanings.  The system teaches a student’s strengths while improving weaknesses through explicit and systematic phonics instruction.  The English Code Language Training System incorporates auditory, visual, and tactile-kinesthetic instruction with highly interactive, digital content.  This multisensory approach allows students…