Compare Train Sim World 4 vs Train Sim World 6: routes, features, DLC compatibility, graphics engine and whether TSW6 is worth the upgrade.
Train Sim World 6 is the newer platform: it retains Train Sim World 4’s Free Roam and compatible add-ons, adds Train Sim World 5’s route hopping, fast travel and Conductor Mode, then introduces random events, train faults and announcements. The main differences are bundled routes, extra systems and TSW6-era content—not Unreal Engine 5.
Train Sim World 4 vs 6 at a glance
| Area | Train Sim World 4 | Train Sim World 6 |
|---|---|---|
| Release generation | 2023 | 2025, two numbered releases later |
| Standard launch routes | East Coast Main Line: Peterborough–Doncaster, Antelope Valley Line: Los Angeles–Lancaster and S-Bahn Vorarlberg: Lindau–Bludenz | Riviera Line: Exeter–Plymouth, Morristown Line: New York & Hoboken–Dover and Bahnstrecke Leipzig–Dresden |
| Core play features | Free Roam, Photo Mode and the TSW4 feature set | Retains those features and inherits route hopping, fast travel and supported Conductor Mode from TSW5 |
| TSW6 additions | Not available | Random events, train faults and announcements on supported content |
| Graphics engine | Unreal Engine 4 | Unreal Engine 4, with route-specific visual improvements rather than an engine-generation change |
| Add-on direction | Runs content released for TSW4 and compatible older generations | Runs most compatible older content plus TSW5- and TSW6-era releases |
Those route lists describe the standard launch packages. Deluxe, Special and other editions include different additional trains or routes, so compare the actual contents of the edition rather than relying on the number printed on it.
What does Train Sim World 6 add over TSW4?
TSW6 combines two generations of changes because it includes both the TSW5 improvements and its own feature set. Route hopping lets supported installed routes connect through shared locations, fast travel reduces the time spent moving around on foot, and Conductor Mode provides ticket and door duties on selected services.
TSW6 then adds operational variation. Random events can disrupt timetable services, train faults introduce failures that require a response, and announcements make supported stations and services feel less static. These systems are not retrofitted equally to every old route or locomotive; availability depends on the content and mode being used.
For a release-by-release breakdown, our guides separate the first set of changes introduced after TSW4 from the additions made between TSW5 and TSW6.
Do Train Sim World 4 DLC and routes work in TSW6?
Most TSW4-era add-ons classed as compatible content can be used in Train Sim World 6 without buying them again. That includes the routes bundled with TSW4 when the corresponding entitlement is recognised.
Compatibility has several practical limits:
- Ownership does not transfer between unrelated platforms or stores. Use the same account and storefront ecosystem on which the add-on was purchased.
- Older content may need to be downloaded separately. Installing TSW6 does not necessarily install an entire existing collection automatically.
- Timetable layers have prerequisites. Owning a locomotive does not make it appear everywhere; the route must support its layer, and any required add-ons must also be installed.
- Compatibility is forward, not backward. TSW6 routes, trains and features cannot be installed into TSW4.
- Content ownership and progress are separate. A route may transfer successfully even if settings, achievements or saved progress do not carry across in exactly the same way.
A common mistake we see is repurchasing a missing route before checking the account, licence and installed add-ons. Confirm that TSW6 and the older content use the same platform account, restore or refresh the relevant licences where the platform provides that facility, then install the route and any required dependencies.
Does TSW6 look better than TSW4?
TSW6 content can look better, but the upgrade is not a blanket graphical remaster of the TSW4 catalogue. Both titles use Unreal Engine 4, as explained in our engine comparison for TSW6 and Unreal Engine 5.
The visible difference usually comes from newer route construction, lighting choices, scenery detail, rolling-stock modelling and timetable density. Loading a TSW4 route inside TSW6 does not replace its original assets with TSW6-quality versions, and it should not be assumed to produce a universal frame-rate increase.
Is TSW6 worth upgrading from TSW4?
TSW6 is the better base for new players because it can run its own releases and most compatible older add-ons, whereas TSW4 cannot run TSW5- or TSW6-era content. It is also the clear choice if you want one of the TSW6 route bundles, random disruptions, train faults, announcements or the inherited TSW5 systems.
Staying with TSW4 remains reasonable if you only drive routes you already own and none of the later features or releases interests you. Your existing routes do not become fundamentally different merely because they are launched through TSW6.
Do not upgrade expecting every old route to be rebuilt, every locomotive to gain fault simulation or all DLC to install automatically. The purchase makes most sense when the included routes and later gameplay systems justify it; our TSW6 value assessment for existing owners covers that decision in more detail.