Welcome back to Dovetail Games’ Season of Reveals 2025! A month-long event to end off the year with a celebration - featuring all new updates and reveals from our teams, and our wonderful third-party development partners for Train Sim World!
We're on our final week of the event, with even more reveals coming up in this article, featuring the longest end-to-end UK route, an all-new Just Trains route, and OUR FIRST EVER GERMAN STEAM LOCOMOTIVE!
Don't forget we have more events to conclude the week before our holiday shutdown, with another of our popular Dovetail Discord Q&A sessions on Tuesday at 3pm UTC, a final community screenshot competitions on Wednesday rewarding keys and new roles, a TSW Roadmap livestream on Thursday, and a final weekly giveaway on Friday where you can enter for free to earn TSW add-on keys!
For those who don't fancy catching up on the past articles however, we've created a special December 2025 TSW Roadmap asset that includes all of our new reveals in a single space, making it easier to see everything coming up in the new year!
Whilst that concludes the end of our reveals for 2025, we still have a few final events running throughout the week before the holidays begin, and one final special surprise in store next Monday (It's not another reveal, but something we hope TSW players can make the most of!).
We hope you enjoyed our announcements and festivities this year - We've having such a blast celebrating with all of you across our communities!
Season of Reveals 2025 - Week 3 Drop
Announcing: Neckartalbahn: Heidelberg - Neckarelz from TSG
We couldn't be more excited to talk about this next German route reveal coming from our partners at TSG, because for the first time since the release of TSW4, this route will be bringing a brand-new Steam locomotive into TSW6 - the BR 23!
TSG: "The Neckartalbahn is a scenic, double-track, fully electrified mainline that winds through the picturesque Neckar valley in southwestern Germany"
"Known for its smooth curves, tunneled sections, and striking riverside views, the line blends efficient rail traffic with one of Germany’s most beautiful natural landscapes."
This route features 53km of track from Heidelberg to Neckarelz, decorated with 15 stations for you to explore, setting the year back to 1974.
Whether you're a fan of steam locomotion, or looking for a electric traction - the Neckartalbahn has you covered, supporting mutliple ways to experience traffic as you journey across the line.
What does this mean for steam simulation improvements?
Alongside the work for this add-on, the TSG team have been working on a series of improvements to the steam simulation physics to support the release, and are actively developing these for Neckartalbahn. These updates should also act as a generalised core improvement to steam physics that can support potential future steam content that our teams or third party developers may wish to create. Any existing steam content won't be impacted by these changes, however, we'll listen closely to your feedback as the work continues and keep you informed on progress.
We don’t have any details to share about what these improvements to the steam physics will entail whilst the team continue development, but we will confirm them in roadmap articles when we learn more.
Now - Let's head back to the UK for our two remaining new announcements!
Announcing: West Coast Main Line: Trent Valley from All Aboard Studios
First up, let's hear from our friends at All Aboard Studios with an all-new UK route that seeks to further build upon the ever-growing West Coast Main Line in Train Sim World - Get ready for WCML: Trent Valley!
Bridging the track between Crewe and Milton Keynes, this route links the end-points of other major WCML routes in TSW, with Crewe as a shared station from Just Trains' upcoming WCML: Crewe - Preston, and Milton Keynes as a shared end-point from TSW5's core UK line WCML South.
Connecting these stations has been no small task, and this Add-on will bring the longest end-to-end UK route into Train Sim World 6, with a massive 108 miles to discover!
AABS: "Master modern traction with the Class 350/4 and cutting-edge Class 807, and experience a packed timetable of high-speed intercity, regional stoppers and heavy freight!"
Please note: Screenshots shown contain layered trains from other routes and do not show the Class 807 included with the Add-on as it continues development.
For everyone excited to continue the WCML adventure, we've got even more to reveal...
Announcing: Cumbrian Coast: Carlisle - Whitehaven from Just Trains
Rounding off the new announcements for Season of Reveals 2025, the JT team are here to announce their latest expansion to their growing WCML network - with Cumbrian Coast: Carlisle-Whitehaven!
The development of the route is still underway, and today we have a couple of WIP grey-scale renders of the new Class 108 DMU included in the release the team were keen to share. We'll aim to keep you updated with new images in the months to come, but for today please enjoy these first glimpses and details from the JT team.
Just Trains: "Experience coastal running between Workington and Whitehaven, with 40 miles of rural scenery and sprawling industrial landscapes to explore!"
"We are also working on new wagons to include in the release, with freight and shunting operations planned across the route."
Be sure to also check out the Just Trains In-Development blog page for frequent updates from their team on content, including historic facts and production insights which you may find interesting!
And with the two UK announcements today from both All Aboard Studios and Just Trains, setting aside differences in eras, this means that Train Sim World will soon have a completed series of routes that take you all the way from the heart of London at the iconic Euston station, right through to Carlisle near the Anglo-Scottish border, with branches and networks to explore along the way! What a journey!
Featured on our Route map, starting from London Euston and working upwards, and the following featured add-ons:
WCML: London Euston-Milton Keynes from Dovetail Games
WCML: Trent Valley from All Aboard Studios (Upcoming Add-on)
Birmingham Cross-City Line from Dovetail Games
WCML: Brimingham-Crewe from All Aboard Studios
WCML: Crewe-Preston from Just Trains (Upcoming Add-on)
Spirit of Steam from Dovetail Games
Blackpool Branches from Just Trains
WCML: Preston-Carlisle from Just Trains
Cumbrian Coast: Carlisle-Whitehaven from Just Trains (Upcoming Add-on)
Gameplay Showcase for Lisbon – Setúbal from VirtuaVia360
And finally for today, we're exicted to show you all a closer look at the development for our first ever Portugese route coming to TSW from the VirtuaVia360 team!
As a recap, hear more from the team on their October development details:
Virtuavia360: "We’re a Portuguese company that has game developers and train enthusiasts, bringing the first ever Portuguese routes to Train Sim World. We are really excited to join the 3rd Party Program at Dovetail, to bring our vision and work to Train Sim World"
"Embark on a stunning 54km journey from Lisbon's bustling hubs to the outer commuter suburbs. Take in amazing views of the Tejo river, the iconic 25 de Abril Bridge, and the picturesque landscape of the Setúbal peninsula. This add-on is recreated with outstanding detail of the commuter rail experience across 14 stations, featuring the 3500 Series EMU and a true-to-life timetable."
"The route will also feature complete Portuguese signaling and safety systems, a faithfully recreated timetable according to real world information, and it will be the first add-on to introduce the 1668mm gauge to TSW!"
If you fancy catching up on our previous information shared from the VirtuaVia360 team, why not dive through our recent roadmap updates:
Christmas 2025 Challenges - Earn New Rewards!
Don't forget, this month we have special in-game Christmas mastery, which are separate from December Mastery Challenges, with rewards around three regions - United Kingdom, Germany and United States of America.
Here's a showcase of the new posters you can unlock from the challenges:
Train Sim World In the News! View the Great British Railways Livery
Did you catch Train Sim World being featured across UK news outlets last week?
As part of the new changes coming to British railways, our teams have helped the Department for Transport to visualise the new Great British Railways Livery coming to railways across the UK within Train Sim World 6.
Our teams were also honoured to help preview this new livery design in-person alongside Hornby at London Bridge station to celebrate the brand unveiling. Visuals were also shown at other railway stations across the UK.
If you fancy taking a look at the new livery yourself, check out our showcase below.
Please note this is just a visualisation of the real-world livery design, used to preview the announcement to the public on December 9th 2025, and not currently an available add-on within Train Sim World 6. Our teams are investigating any opportunities we have to bring this into TSW6, and we'll share any news if we can confirm it.
Winter 2025 Player Survey - Now Closed
Thank you for everyone who submitted feedback and thoughts for our Winter 2025 TSW survey, these will massively support our teams guide and direct the future of Train Sim World in a way that suits all of you.
Everything asked in our survey above was designed to gauge how our players feel about new content, and about our games as a whole - but please remember that the inclusion of content/features in the survey is not confirmation that we are developing these, or if it'll happen in the future - this is why we're asking you first how you feel about it.
We've now contacted the 20 lucky entrants who have won a TSW Add-on of their choice from completing the survey, and we thank you all for supporting us another year, and helping our teams build the best future for Train Sim World.
TSW December 2025 Roadmap Livestream
As we close off for the year, Exec Producer of Trains, Matt, and Senior Community Manager, Alex, will also be live this Thursday, December 18th 2025, to discuss the entirety of the Season of Reveals announcements in full, and answer your questions live!
Send us your questions in advance on our December 2025 Roadmap Q&A thread, and we’ll answer as many as we can!
The stream will begin from 19:00 UTC on our YouTube and Twitch channels, and we can’t wait to see you there!
So... What's Next Week?
Whilst the Season of Reveals is drawing to a close, we do have a quick update on the GWE Remaster before we finish for the year.
Next week, we'll be sharing some first gameplay as a final festive treat for you. We're very excited to be bringing you this early in 2026!
A smaller, final article will be shared on Monday, December 22nd 2025, a little later in the evening than usual, as our final update for the year.
Join us in the Community!
We have plenty of fantastic communities to get involved with for Train Sim World, from our Dovetail Live forums, our new official Discord, and community-led spaces that we are active in – be sure to check this out below and talk directly to our teams!
If you're looking to get involved in our weekely screenshot competitions every Wednesday this month, with special rewards and add-on key giveaways, be sure to join our Dovetail Discord (via http://discord.gg/dovetailgames), as this is where the events will be hosted.
Find out more about Train Sim World 6 by following @trainsimworld on Twitter/X, Instagram, Threads, Facebook, YouTube, Twitch, TikTok, and Discord