planetarian HD: its lineage, descendants, and standing in Japan

Penguin Wars Buried gem

Per Steam's own listing, this is an exploration-style adventure novel: the star is dying, and this is the last week before it ends. Where the girl at its center goes, who she talks to, and how she spends her final night are left entirely up to the player, navigated by clicking objects and movement points on screen while an immersive combination of cinematic visuals and music carries the story forward. The soundtrack runs 22 tracks (excluding sound effects and jingles), plus 3 more heard only in-game, and reaching all 4 endings takes roughly 6 to 7 hours. Made and self-published by a two-person circle, Shachikumazu, longtime friends who, per a Game*Spark interview, work respectively as a systems engineer in Tokyo and hail from the Kansai region; the two previously released a separate, differently styled omnibus adventure, Reiche wa Gaitou no Shita de, which shares one recurring character but was, per the developer's own account, deliberately redesigned toward a more broadly approachable style rather than built as a direct sequel. Steam's own AI Generated Content Disclosure section states plainly that some still-image backgrounds include AI-generated material that was added and corrected by hand, that AI-generated material was used for reference alongside free illustrations and photos in composing some stills, and that 3 of the 22 soundtrack songs, after being composed by the creator, had part of their arrangement based on AI-generated material; this pick states that disclosure as written rather than claiming the usual absence of AI-generated assets. Released February 20, 2026 at ¥600, it is Very Positive at about 97.8 percent over 90 reviews (88 positive, 2 negative per Steam's own review API), a paid title, not free, fully launched and not in Early Access, and per Steam's own content descriptors, nothing sexual. It supports Japanese only, no English option exists at all, and of its 90 reviews, 79 (87.8 percent) are in Japanese while not one is in English, a language wall in the most literal sense this site tracks.

Misuzu no Kuni Buried gem

The premise is one line of alternate administrative history and it is very good: in a Japan at the end of the twentieth century, there exists inside the country a special autonomous territory known as the Land of the Tengu. Not a hidden world, not a portal, not another dimension. A region. With a border you enter. A girl named Misuzu enters it and joins the tengu training, and what unfolds from there is a fantasy school drama with beast gods called bake, a tengu princess, and a magical faculty called jintsuriki. The store text is unusually plain about the form it takes: this is a kinetic novel with no choices and no branching paths, read forward by clicking, running two to three hours, with a recollection mode afterwards for revisiting the art and the original soundtrack. It is the first and so far only thing StudioHommage has put on Steam; a direct check of Steam's developer search under that name returns exactly one title, and the contact address is their own site rather than a company. Released April 25, 2025 at ¥500, it is at 100 percent across 23 reviews (23 positive, zero negative per Steam's own review API), a paid title, not free, fully launched and not in Early Access. Steam's content descriptors are completely empty, there is no mature content section, and none of its fourteen user tags touch anything sexual. There is an AI disclosure and this site quotes those in full rather than paraphrasing: some of the backgrounds contain elements that were modified or generated with the assistance of AI. That is the whole of it; no other category is covered. And then there is the detail that made this pick worth writing. The English-language store page carries an English description, and the developer ends it with a sentence addressed to the people reading it: supported language, Japanese only. They wrote in English, to English readers, to tell them they cannot read this. Of its 23 reviews, exactly zero are in English.