Hmmsim Metro: Enhanced Features and Fixes Announced

Hmmsim Metro Launches Major Update with New Features and Bug Fixes

September 21, 2025 - Hmmsim Metro, the highly immersive subway simulation game set in Seoul's iconic Line 1, has released a significant update. This update introduces a wealth of new features and addresses several bugs to enhance gameplay and realism.

New Features:

• Redesigned train circuit with electrical interconnections for each car
• Implementation of critical functions such as parking brake, security brake, EBS, EBCOS, ACM, and CM operations
• Circuit monitoring feature to check the overall status in real time
• Start mode option for initial startup state
• Switchboard control for each car with linked switches for individual control
• First person camera option from the cab, allowing walking around inside the train and switching between cab and first person view
• New 'Around Camera' and 'Outside Camera' features for different external viewing angles
• Feature to continue playing consecutive scenarios without quitting, enabling repeated timetables or depot entry/exit scenarios
• Integration of separate depot entry/exit scenarios
• Arduino controller support with serial communication for direct linking to the game
• Performance improvements with a frame rate increase of approximately 10~20%, especially in scenes with many AI trains where improvement exceeds 50%
• Addition of time acceleration feature to shorten train startup or waiting times
• Introduction of the new Saemaeul model for AI trains and improvements to the diesel locomotive and Mugunghwa models

Bug Fixes:

• Removed shortcut for switching cabs, requiring manual switch by walking to the opposite cab
• Other unspecified bug fixes related to performance and functionality improvements

For more details about this update, please visit the official announcement page:

https://steamcommunity.com/games/1591420/announcements/detail/511843796724483935