Microsoft Train Simulator 2 (MSTS 2) is a "lost" title that was officially twice and was never released to the public. The History of the Cancelled Sequel
Websites claiming to offer a "full download" of MSTS 2 are typically providing malware or a completely different game with a renamed file.
It can run almost all original Microsoft Train Simulator content but with better graphics and performance.
Open Rails is a free, open-source project created by the community.
Supports modern hardware, multiplayer mode, and advanced physics that the original game lacked.