About Ultima Underworld: The Stygian Abyss

Historical note: This game was the first, first person 3D game (it preceded Wolfenstein 3D by two months). Also the engine is much more advanced than the Wolfenstein 3D engine was. Not just in the RPG elements but the 3D environment, dynamic lighting, curved surfaces, real bridges and tunnels, texture resolution and variation, and vertical variation in the terrain. However, the system requirements of UW are higher than Wolf 3D.