Akagawa Jirou no Yuurei Ressha is VN of the February 1991 by default - Prontis is too much of a half-baked game.
Based on detective novel. Eight people have vanished and rumors state that they were carried away by ghost train. The key to these events lies in a remote village.
It is famicom game so it inherits its disadvantages. As in every famicom detective story that I've seen you have to move around by yourself. So lots of long distances walking and need to search all the corners and the speed of walking is soooooo sloooow. Since it's literary adaptation, story is really good. But original novel was just 70 pages and here we get slightly over 2 hours of gameplay. We get to discover the mystery of disappearance, but not find the culprit. Unlike other detective works, no new criminal cases arise in the mids of investigation, so we do our job in the village and that's it.
プロンティス  Cross Media Soft 1
A transmission signal was received from a carriage vessel on the way to Amon. The cockpit was penetrated by a meteorite and no survivors were possible. Vessel fell into planet atmosphere. Your orders are simple - confirm location of wreckage and return home. Among the treasures on the ship you discover a sealed container.
Great plot, right? True. There are several incidents and possessions and the reason is creature Prontis from container. You never know who's going to stab you from behind and that's new. This game has no branches. CG are quite good and some moves are even animated. But production values are low, story is not long enough and lack of direction is felt. The reason of that is not so evident. Enix company had a clash among its members and part of them left the company. They used the story that they worked on in Enix to make Prontis game and hurriedly issued it in February 1991. They really needed to be the first, that's why story feels great but everything else is lacking. On March 1991 Enix issues their own game Jesus II which uses the same story with cosmetic details changed. It was a disaster for everyone. Players did not want to play the same game for the second time while the memory of a raw product was still new. Enix did not get its sales aim. But that's already Jesus II story that will unfold in March 1991.
3. SAP Tokushu Koudou Keisatsu File:M661-51 SAP特殊行動警察 FILE：M661－51  GreatRon belongs to a special police unit in a near future. He is sent on a mission to rescue certain girls with the help of his laser gun and laser sword.
There's more text than in normal RPGs, but it's still an RPG.
ファンタシースターII テキストアドベンチャー ヒューイの冒険  Sega 1 2 3 4
Hugh Thompson (Japanese: ヒューイ・リーン (Hyūi Lean or Huey Reane)) is a biologist who adapts his knowledge of anatomy to combating biomonsters.
Game is localized and has enough information in English.