Hmmsim is the first train simulation game developed in Korea and now available on mobile devices. This game offers a basic route based on Seoulmetro Line 2, providing a highly realistic graphical experience. Players can immerse themselves in the operation of a metro system.

One unique feature of Hmmsim is its ability to add BVE Trainsim Add-Ons, making it the first mobile train simulation game to offer this option. This means that players can enjoy playing BVE routes on their mobile devices, just like they used to on their PCs.

What sets Hmmsim apart is its infinite potential for customization. Players can add as many Add-Ons as they want, allowing them to personalize their gaming experience according to their preferences.