
Screenshots

Watch trailer on Steam ↗海子 UMIKO
盾构机 Tunnel Boring Machine · Published by 盾构机 Tunnel Boring Machine
Very Positive — 99% positive (70 reviews)
Last updated 2 Oct 2026
"海子 UMIKO" is a psychological horror visual novel. Engage in conversations with Umiko, complete various mini-games, solve puzzles, and gradually piece together the dark truths she tries to hide about herself and her dimension from fragmented narratives. Preserve your fragile friendship for a week!
RPG, Free To Play · 2025 · More free games
Explore Umiko's mysterious world by solving puzzles and engaging in conversations. Piece together her dark past in this psychological horror visual novel from Tunnel Boring Machine, released in 2025.
About this game
"海子 UMIKO" is a psychological horror visual novel. Through direct conversations between the player and the unfamiliar girl "Umiko," as well as fragmented narratives hidden within mini-games and puzzles, this game pieces together a past event that occurred in her dimension.
Game Content
Engage in conversations with the unfamiliar girl "Umiko,"
complete various mini-games, solve puzzles,
read hidden texts, collect all the photos in the album,
piece together the complete story of Umiko and her dimension's past and present,
attempt to change how the story ends,
and do everything you can to maintain your fragile friendship for a week!
Game Duration: Approximately 1 hour;
Number of Endings: 6 wrong endings and 1 true ending.
About Story
This is a story about 【Ending】.
As summer approaches and summer nears its end,
the lively and adorable unfamiliar girl "Umiko" sends you a cross-dimensional call request.
Chatting with her might be a great way to pass the time!
Whether the topic is friendship, food, or fashion, she is always willing to talk openly with you.
Gradually uncover Umiko's story and the world she inhabits through lighthearted and harmonious interactions!
...However, what exactly is the 【unforgivable, irreversible thing】 that Umiko has been trying to hide, the thing she once did?
When and where did the story about 【Me】, 【Leader】, and 【Senior】 that appears on the screen take place?
The occasional static, screen distortions, and faint low-frequency noises...
Everything feels unsettling yet intriguing.
Still, no matter what happens on the other side of the screen, it won't affect 【you】, so there's nothing to worry about.
Content Warning
During gameplay, there may be loud noises, screen flickering, and sudden horror elements. This game is not suitable for individuals with photosensitive epilepsy, children or those who are easily disturbed.
System Requirements
Will my PC run this? →Minimum
- OS: Any version of Windows
- Processor: The programs should run normally as long as the computer can still start up.
- Memory: 512 MB RAM
- Graphics: The graphics should display normally as long as the screen can still light up.
- Storage: 200 MB available space
- Sound Card: The audios should play normally as long as the speakers can still produce sound.
Recommended
- OS *: Windows 98/Me/XP/Vista/7/8/8.1/10
- Processor: Intel I3/I5/I7
- Memory: 4 GB RAM
- Graphics: nVidia GT1030
- Storage: 200 MB available space
- Sound Card: Realtek
Supported Languages
Latest news
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