This is definetly one of the best retro game commercials from the '80s, with a very professional TV anime show quality production.
Despite having some really great developer teams like WOLFTEAM and RIOT among their ranks, NIHON TELENET nonetheless gained a questionable reputation as a game publisher in Japan, since in general most of the games they published were praised more for their excellent character designs and decent storylines than for their gameplay.
This CM is further proof that NIHON TELENET were at their best when it came to come up with cool anime character designs and themes. So I really can't help but think they would have fared better if they had also incursionated as an animation studio.
Ironically, out of the 4 different incarnations of the original VALIS game, the FAMICOM version is by much the worst. But since the FAMICOM was by far and away the most popular home game system in Japan at the time, then it's very likely the sales expectations of the FC version were superior that those for the other versions, and that alone was probably more than enough incentive for NIHON TELENET to release this exceptional promo CM for it.