Train Sim World 6: Cathcart Circle Line: Glasgow - Neilston & Newton

Train Sim World 6: Cathcart Circle Line: Glasgow – Neilston & Newton is a downloadable content (DLC) expansion developed and published by Dovetail Games. Released on August 26, 2025, this DLC offers players the opportunity to experience Glasgow's suburban rail network, focusing on the Cathcart Circle Line and its branches to Neilston and Newton. The route features the BR Class 314 electric multiple unit (EMU) in ScotRail's Saltire livery, providing a nostalgic yet modern experience of Scottish commuter rail.

The DLC includes a detailed 20-mile (32 km) route connecting Glasgow Central to Neilston and Newton via the Cathcart Circle. Players can operate the BR Class 314 EMU on various services, including shuttle runs between Glasgow and Neilston/Newton, as well as depot movements. The route offers a variety of gameplay options, such as driving trains, completing route tasks, and utilizing the Scenario Planner and Livery Designer. The addition of the BR Class 380 DLC in July 2024 brought the route up to Train Sim World 4 standards, enhancing visual fidelity with updated foliage, track textures, and lighting effects.

Promotion for the Cathcart Circle Line DLC emphasized its authenticity and the opportunity to experience a key part of Scotland's rail network. Dovetail Games highlighted the detailed modeling of the BR Class 314 EMU and the immersive environments along the Cathcart Circle route. Marketing materials showcased the route's historical significance and the challenges of operating commuter services in Glasgow's urban landscape.

Reception of the DLC has been generally positive, with players praising the attention to detail and the realistic simulation of the Cathcart Circle Line. The route's challenging gradients and station stops provide an engaging experience for both newcomers and seasoned players. However, some players have noted performance optimization concerns and the steep learning curve associated with the route's demanding operations. Despite these minor drawbacks, the Cathcart Circle Line DLC is considered a valuable addition for those seeking a more immersive and historically accurate experience in Train Sim World 6.