Complex sentence: The first'real' textured 3D game, allowing six degrees of freedom (three movement axes, three rotation axes), was "Descent", which also featured 3D models entirely made from polygons (actually just triangles) instead of sprites.
Split into simpler sentences: The first'real' textured 3D game, allowing six degrees of freedom (three movement axes, three rotation axes), was "Descent". It also featured 3D models entirely made from polygons (actually just triangles) instead of sprites.