Complex sentence: The University of Tokyo's 1979 "Heiankyo Alien" for the PC-8001 and arcades was a "trap' em up" puzzle action game, a precursor to puzzle action games such as "Lode Runner".
Split into simpler sentences: The University of Tokyo's 1979 "Heiankyo Alien" for the PC-8001 and arcades was a "trap' em up" puzzle action game. It was a precursor to later puzzle action games such as "Lode Runner".