Trainz Simulator, developed by Kuju Entertainment and published by Activision, is a popular train simulation video game series. However, it appears that "Keks 40" might be related to a custom content creator or a specific train set within the Trainz universe. Given the specificity of the name "Keks 40," this report aims to provide an overview of the Trainz Simulator series, with a focus on custom content, specifically mentioning "Keks 40" where relevant.