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At a remote mountain rail post, manage oxygen and routine duties while a strange train shift gradually raises questions.
Released 19 Nov 2024
Whistle the Train
Manage Thin-Air Breathing
Earn Your Air
In a lonely station atop a mountain, a train rumbles its precious cargo to places unknown. Now is your shift. Keep the pace. Uncover a mystery. Fight for your last breath. The air is thin up here.
Developed by Julien Eveillé · Published by CRITICAL REFLEX









You take a shift at the isolated Border Post, a station high in the mountains. Your main duty is to watch an endless train and blow a whistle when it slows, with fellow worker Mo on hand to explain the job.
The shift also means delivering reports, cleaning a water filter, gathering discarded wood, and using station machines. Every exertion consumes breath, so you need to monitor your oxygen and earn rationed air canisters to keep working.
As the routine continues, details around the station prompt questions for Mo and invite exploration. A country choice affects the difficulty, while the semi-linear story includes decisions and multiple endings.
Players who enjoy THRESHOLD often praise its oppressive atmosphere, unusual mountain-work premise, and mystery that emerges through routine tasks and environmental details. The oxygen-management loop and retro visual style also stand out for some reviewers. Reactions are more mixed on the story’s payoff and the repetitive work, and several players mention the game’s short length or technical and checkpoint frustrations.

High in the mountains, an endless train thunders through a decaying station. This is the Border Post. Your job is simple: blow a whistle to keep the train on schedule. But the air is thin up here.
Don’t speak. Don’t run. Don’t look in the train. Just do your job. It’ll all be over soon.
It isn’t impossible to breathe in the Border Post. Just impossible to catch your breath. Every exertion is another foot in the grave. Each blow of your whistle is a death sentence. Your only reprieve are air canisters rationed out for your good work. So you better be a good worker.
There’s no shortage of tasks to keep you busy during your shift. Deliver reports. Clean the water filter. Collect discarded wood. And don’t worry about that smell.
Mo is your friend and fellow Border Post worker. His shift is over, but he’ll happily come running if you call. He’ll answer any questions you might have. Well, except for that question. He wouldn’t lie to you. Don’t make him.
Your choices matter. Which choices? What country are you from? How could it matter? Experience a semi-linear narrative where every moment could be a new branching path. Or not. Such is life.




| Platforms | Windows |
|---|---|
| Achievements | 14 |
| Age ratings |
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| Controller support | Xbox |
| Controller required | No |