A scenario editor allows the creation of tasks such as picking up passengers, hauling cargo and shunting wagons around yards.

[2] These tools also allow players to build unlimited sizes of layouts, create their own scenery and rolling stock and modify the provided content by adding features or re-skins.

Some jagged graphics were criticized (with foliage going through the cab instead of bouncing off the windshield, for example) and the fact that only true rail fanatics could ever get any fun out of KRS.

"[4] With the release of Rail Simulator in October 2007, Kuju Entertainment finished development and disbanded the RailSim team turning its attention to the next project.

[9] RailWorks is an upgrade to Rail Simulator, containing new rolling stock, tools that had to be separately downloaded, significant graphical advancements such as modification of the existing content, bug fixes, backwards compatibility and the ability to trade elements from the virtual world with other users online.