In the Netherlands, approximately 451,900 people suffer from stroke effects, with 80% experiencing reduced arm-hand dexterity. These individuals benefit from a rehabilitation tool that can be used independently, encouraging frequent use and providing direct progress insights, such as increased hand or finger strength. HandForce (Haptic Force Feedback on Object-manipulation in Real and Computational Environments) aims to design a hand rehabilitation tool with the following objectives: 1) home use by clients, 2) visual feedback on a computer screen or tablet, 3) force feedback to clients, and 4) integration with Virtual Reality (VR) games when possible. Although technologies like VR, gaming, and motion tracking are largely available, they are not yet specifically applicable to hand rehabilitation. This project explores how hand-object manipulation can be simulated in a virtual environment to match the real, physical experience, making it a useful tool for hand rehabilitation by following the process of the double diamond method. Outcome measures and user requirements are assessed with hand therapists and patients. This development step aims to create a (VR) rehabilitation tool with force feedback, enabling patients to practice independently at home and monitor their progress directly. The project consortium is formed by 2 knowledge institutions, 9 SMEs, and 2 rehab centres.