If it wasn't helpfully written on the menu screen, OXM might never have realized this was a sequel to 2007's shonky Oblivion knock-off. It's built in a completely new engine and the difference is obvious in the setting and character animation.
While it all kicks off in a familiar dungeon setting, it's got fancy lighting, proper reflections and full physics models for nearly every environmental object. At no point did the framerate crash, textures vanish, or script lapse into gibberish. What happened?