Augmentinel
A cross-platform port of Simon Owen's Augmentinel.
Augmentinel is Simon Owen’s re-skinned version of Geoff Crammond’s classic The Sentinel. It emulates the Spectrum original for gameplay and adds accelerated 3D, free look and VR.
This is an unofficial cross-platform fork. I converted it from Win32/Direct3D 11 to SDL2/OpenGL, which adds macOS and Linux support, along with app bundling, settings persistence and a fullscreen toggle.