All aboard, aspiring tycoon! Definitive-SMR-Launcher puts the full power of the rails in your hands, taking your Sid Meier’s Railroads! experience to the next level. Whether you’re laying your first tracks or expanding a sprawling empire, this launcher keeps your engines running smoothly and your journeys exciting:
• 🗺️ Custom Maps Express – Tap into the extensive Sid Meier’s Railroads Custom Maps Collection on the Internet Archive https://archive.org/details/sid-meiers-railroads-custom-maps-collection. Instantly download new routes and challenges crafted by the community, and keep your network growing without ever leaving the launcher.
• ⚙️ OpenSpy Engine Upgrade – Upgrade your game to play online with OpenSpy servers. The launcher makes your game large-address aware (LAA), letting it use more memory and run bigger, more complex maps without derailments.
• 🚦 Harder Difficulty Junction – Craving a real challenge? Activate advanced difficulty levels to put your management and strategy skills to the ultimate test. Can you keep your trains on time under pressure?
• 🎮 One-Click Departure – Browse and select maps directly within the launcher, and roll straight into the action. No detours, no extra stops—just pure railroading fun.
• 📦 Streamlined Operations – From downloading community maps to enabling key patches, Definitive-SMR-Launcher automates the tedious tasks so you can focus on building the most profitable, sprawling rail empire the world has ever seen.
Whether you’re competing online, exploring new maps, or mastering the toughest routes, Definitive-SMR-Launcher ensures your trains are always on schedule. Hop on, fire up your engines, and let your rail adventure steam ahead!
Join the Sid Meier's Railroads Discord and learn how you can submit your own maps to the Internet Archive collection or organize a multiple game https://discord.gg/Th8MBdYW5v
Supports Steam and Disk versions
News update 22/09/2025
First release of Definitive-SMR-Launcher, maps within the Internet Archive are slowly being added and I am in the process of applying for a collection. I am still working out the way people can submit new maps, follow the discord to stay up to date.
The map folder structure is as follows:
Name_Of_Map_v1_00.7z
- CustomAssets
- UserMaps
- mapIcon.jpg
- mapInfo.txt
File name has no spaces, capital at the start of each word, ends with lower case v with the version number, use 7zip to make a 7z file.
All Custom Assets go in the CustomAssets folder
All map data goes in UserMaps
512x512 jpg of the map named mapIcon.jpg
Example of mapInfo.txt
V1.00
2012/12/19
Author
About your map