DCUE
DreamCast Unity Exporter. Export Unity 3D scenes via a custom editor script (DreamExporter.cs) and render them natively on the Sega Dreamcast. The engine handles mesh optimization (triangle stripping), PVR texture compression, diffuse lighting (up to 8 lights), frustum culling, and camera control - all targeting the Dreamcast’s PowerVR hardware via KOS and an extended rwdc renderer (dca3-derived).
DCUE was built to port The Liquid Jet to the Dreamcast, however that project stalled somewhere.