When Trainz was released in 2002, it was a hit among railroad enthusiasts. Half simulation and half creativity tool, Trainz let you build the virtual railroads of your dreams with a very user-friendly set of editing tools. Then you could ride the rails across your newly created routes or those created by other fans. For all of Trainz’s strengths, the program was limited in many ways. The focus tended to be more on simulating model railroading than simulating real-world railroading, at least until ambitious fans learned how to push the program’s boundaries.