Train Sim World 6: Cargo Line Vol. 5 - Nuclear

Skyhook Games developed the Cargo Line Vol. 5 – Nuclear DLC for Train Sim World 6, and it was published by Dovetail Games. It launched on 18 November 2025 on Steam, and is also available on console platforms such as PlayStation and Xbox under the same title. The DLC requires the base Train Sim World 6 game to play.

This add‑on brings freight simulation to the fore, tasking players with hauling spent nuclear fuel using the FNA‑D Nuclear Flask wagons. These wagons are coupled with modernised BR Class 20/3 locomotives in a distinctive unbranded Oxford blue livery. The pack includes both loaded and unloaded variants of the flask wagons, realistic physics, and detailed driving cabs featuring modern safety and communications equipment.

Players can tackle a variety of scenarios and timetable services across two routes: the West Coast Main Line between London Euston and Milton Keynes, and the Preston–Carlisle stretch. The DLC supports Free Roam and Formation Designer, meaning you can drive the Class 20 with the nuclear cargo on any route you like, or use it for an enthusiast-style run. The content takes advantage of Dovetail’s SimuGraph vehicle dynamics engine and Unreal Engine 4 technology.

Promotion around the DLC was included in Train Sim World 6’s roadmap with developer commentary on the history of nuclear freight in the UK, plus screenshots showing the Class 20/3 and FNA‑D wagons in action. In community discussions, fans expressed excitement around the unique cargo and the choice of locomotive, noting the distinctive design decisions such as the de‑branded loco. As of release, there were no user reviews on Steam yet, but the anticipation from the community along with previous Cargo Line packs suggests a positive reception among train sim enthusiasts.