- Early Access is available for Standard Edition and Deluxe Edition pre-orders
- Only players who have purchased Deluxe Edition will receive access to the updated Spirit of Steam for Train Sim World 3 (anyone else receiving the free Spirit of Steam update will do so with release on the 6th September).
- Standard Edition for Xbox is not available, due to it being on GamePass on launch day
- Players can access Early Access during any period between live time on September 2nd, and launch on September 6th, with the purchase of Standard or Deluxe Editions
- New Bakerloo Timetable
- Peninsula Corridor Preservation Crew update [huge]
- Rhein-Ruhr Osten Preservation Crew update [medium]
- Oakville Subdivision Preservation Crew update [huge]
- Cathcart Preservation Crew update [tiny]
- Long Island Railroad Preservation Crew update [small]
- LGV Preservation Crew update [tiny]
- 2 new Luzern-Sursee scenarios
- Blue glow when entering tunnels has been removed
- Lightning should no longer be present when in tunnels
- 500Hz LZB magnet now triggers outside Würzburg

- Train length will be limited to 100 wagons on 9th-gen and 50 wagons on 8th-gen
- Services and layers:
- Southeastern High Speed Extended – same number of playable and AI services
- Cajon Pass – same number of playable services, with shorter formations on 8th-gen (see above)
- Kassel-Würzburg – same number of playable and AI services
- 9th-gen players will experience better graphical performance
- 9th-gen players will have better game performance (both 8th and 9th-gen we are happy with performance for though)
- We will monitor your feedback over the Early Access window and make amendments if needed to ensure the best experience for you all.
- [Xbox One] [Kassel-Würzburg] – Northbound services from Würzburg may cause some crashes (this is fixed in the launch build)
- [PS4] [Kassel-Würzburg] – 3 collectibles unable to be collected on
- [PS4] [SEHS] – Improvements to Strood tunnel lighting
- [PS4] [SEHS] – Improvements to loco darkening when entering the first tunnel after St Pancras station
- [All platforms] [Cajon Pass] – ‘Shop Class’ scenario – train does not start after completing tutorial
- [PS4] [Cajon Pass] – Alerter on ES44C4 currently unable to reset when locomotive is stationary after Penalty brake application
- [Xbox on Windows] Train Sim World 3 core routes don’t have journey chapters
- [Xbox on Windows] Livery Designer missing some locomotives