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Steam News29 January 20265mo ago

Main Build 0129 Update

Hello. In this update, passengers and CCTV have been added. Passengers Moving passengers have been added to stations and trains.

Full notes

Full Hmmsim Metro update

Read the full published notes in a cleaner layout. The original post stays linked below.

Repeated intro

Hello.

What changed

0 fixes6 additions3 changes0 removals
  • Gameplay
  • UI and audio
  • Performance
  • Fixes
  • Maps
addedIn this update, passengers and CCTV have been added.
addedMoving passengers have been added to stations and trains. Passengers board or alight depending on the situation, showing different levels of crowding based on time of day, station, and direction.
addedPlatform CCTV monitors have been added, allowing you to check passengers boarding or alighting. They are also displayed on the CCTV monitor in the one-handle train cab.
changedSounds
addedAmbient sounds have been added to outdoor areas and tunnels, and traffic driving sounds have been changed. When windows or doors are opened inside the train, outside sounds can now be heard.
addedPassenger density and CCTV settings have been added. (If your PC has sufficient performance, it is recommended to set passenger density to the maximum.)

Hmmsim Metro changes

addedIn this update, passengers and CCTV have been added.
addedMoving passengers have been added to stations and trains. Passengers board or alight depending on the situation, showing different levels of crowding based on time of day, station, and direction.
addedPlatform CCTV monitors have been added, allowing you to check passengers boarding or alighting. They are also displayed on the CCTV monitor in the one-handle train cab.
changedSounds
addedAmbient sounds have been added to outdoor areas and tunnels, and traffic driving sounds have been changed. When windows or doors are opened inside the train, outside sounds can now be heard.

In this update, passengers and CCTV have been added.

Passengers

Moving passengers have been added to stations and trains. Passengers board or alight depending on the situation, showing different levels of crowding based on time of day, station, and direction.

CCTV

Platform CCTV monitors have been added, allowing you to check passengers boarding or alighting. They are also displayed on the CCTV monitor in the one-handle train cab.

Sounds

Ambient sounds have been added to outdoor areas and tunnels, and traffic driving sounds have been changed. When windows or doors are opened inside the train, outside sounds can now be heard.

Settings

Passenger density and CCTV settings have been added. (If your PC has sufficient performance, it is recommended to set passenger density to the maximum.)

Environment volume and train volume settings have been added. A display showing the current value of sliders has been added.

Other

Doors will now close only when the departure time is reached. An issue where train doors appeared blocked has been fixed. The route from Kwangwoon Univ. Station platforms 6 and 7 toward Seokgye Station has been changed. AS pressure and pneumatic doors are now linked to MR pressure, and the rate of BC pressure increase and decrease has been limited.

At the early stage of development, I did not plan to implement passenger features, as I felt they would be difficult to realize naturally. Due to many requests over time, I developed the passenger feature, but there are clear limitations to what can be expressed through solo development. I believe that further improving the modeling and animation, or implementing more natural movements, is realistically difficult.

Thank you.

Source

Steam News / 29 January 2026

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