Running on a retro handheld via PortMaster is a bit of a "holy grail" for many users, though it comes with a significant catch. While the original Diablo is easily playable through the DevilutionX port, Diablo II does not have a direct native port within the PortMaster library yet.
While Diablo II remains out of reach for the PortMaster ecosystem due to its closed-source nature, Diablo 1 offers a fully native, excellent alternative for your retro handheld sessions. diablo 2 portmaster