Kageroh: Shadow Corridor: its lineage, descendants, and standing in Japan

Shadow Corridor Buried gem

A first-person, combat-free 3D horror escape game: at summer dusk you wander into an ancient, labyrinthine mansion of bamboo and tatami, and must scour its procedurally generated halls for glowing Magatama stones to unlock the door out, carrying only a lighter as your one light source (extinguishing it helps you go undetected, but leaves you blind) plus whatever active items, firecrackers, a teleport mirror, and passive ones, like a stamina leaf, you scavenge along the way, while several distinct kinds of Noh-mask apparition, each with its own detection patterns, hunt you by sight and by sound and must be read and slipped past rather than fought. Developed and self-published by the solo Japanese developer Space Onigiri Game LLC, led by Kazuki Shiroma, who began posting early development footage under the handle Kagetsu (花月) in 2016. Per player reviews, dying restarts you at a checkpoint on the same generated map with your held items intact, but any reusable markers you had already placed stay wherever you dropped them, and quitting the run outright regenerates the whole map and sends the next level back to zero items, a real risk some reviews flag directly. Beyond that first corridor, further stages carry the story onward across multiple difficulty levels, with a bonus area unlocked only through what one reviewer called an 'ironman-esque' challenge. This is a ground-up commercial expansion of what began as a free Japanese indie demo: Steam's own listing describes the finished release as carrying 'more than ten times' that original's content, on top of a new story and additional mechanics. Released March 8, 2019, it is Very Positive at 90 percent over 2,176 reviews (1,969 positive per Steam's own review API), a paid title at $7.99 in the US (¥820 in Japan), not free, fully launched and not in Early Access, with no AI-generated assets and, per Steam's own content descriptors, nothing sexual (ids: none, notes: none). It is voiced entirely in Japanese, with English, Korean, Russian, and Simplified Chinese available as text. Western outlets including WayTooManyGames (Final Verdict: 4.5) and Real Otaku Gamer have already reviewed it, and Metacritic hosts further critic reviews of its console ports from GameGrin, Video Chums, and Pure Nintendo, yet only about 73 of its 2,176 reviews, roughly 3.35 percent, are in English so far, so this overwhelmingly positive reception still reads almost entirely in Japanese.

Niconico-san Buried gem

It starts as a rumour going around school, and the store page words it the way a rumour actually gets worded: down a certain alley there is a warehouse, and a smiling man stands there beckoning. Anyone who sees him is drawn to the warehouse and goes missing. Then one day, on your way home, you have no choice but to take that alley. You get close to the warehouse, the door opens by itself, a hand comes out, and by the time you wake up you are somewhere else. What follows is a first-person chase horror in the other side of a Japanese residential neighbourhood: you look for the items you need to get out while the smiling man walks the place looking for you. The store calls it high-speed horror, and the reason it can is the energy drink, a consumable you spend to run, so the resource you manage is not ammunition or health but how long you are allowed to be faster than the thing behind you. It is thirty minutes to an hour, with two endings and three branching ending movies, at ¥420. Steam's user tags catch the texture better than the official genre does, putting Walking Simulator, Hidden Object, Immersive Sim, FMV and Dogs next to Horror. Made by TI-BA, one person; AUTOMATON's Japanese edition describes them plainly as a domestic solo developer, their YouTube channel is under the name Chiiba, and their blog profile says they mostly make horror games in Unity, with a personal Gmail as the only contact. Steam's developer search under that name returns exactly one title. Released April 24, 2025, it is at 95 percent across 69 reviews (66 positive, 3 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 nothing in its nineteen user tags is sexual. There is an AI disclosure, and here is its full text: the developers say they use AI-generated images of fictional characters in certain parts of the game, which the Japanese version specifies as photographs of people appearing in the fictional in-game advertisements. English and Simplified Chinese are supported alongside Japanese. Of the 69 reviews, 25 are Japanese, 15 English, 13 Korean and 11 Simplified Chinese, and not one editorial article about it exists in English.