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 continuing with all-new Week 2 reveals and updates in this article, and don't forget we'll have more events you can get involved in throughout the week, with Discord Q&As on Tuesday, community screenshot competitions on Wednesday, Dovetail livestreams on Thursday, and a special weekly giveaway you can enter for free on Fridays and over the weekend!

Don't forget, coming up tomorrow is the release of the new Frankenbahn: Stuttgart-Heilbronn route, and later in the article you'll find key links to the preview livestream from our executive producer we hosted last week, and today you can find ambassador content that showcases the route, alongside a new German-speaking spotlight of the line hosted on TrainSimPlay's YouTube channel with our Technical Producer Lukas.

After this week, we still have one more drop planned on Monday December 15th for our final set of reveals, so be sure to follow along in our community spaces and our social channels for the latest information as soon as it’s shared.

That’s right! Firefly Simulations, which we introduced previously in the November roadmap, are entering the scene with the Medway Valley Line for Train Sim World 6! Speaking on behalf of Firefly, MVL aficionado DTG James will take you through the highlights:

James: "Anyone who knows me would be aware I’m a Medway Valley local and I’ve long been an advocate for getting the Medway Valley Line into Train Sim World, and I was delighted when Firefly Simulations approached us with their plan! I’ve assisted with research and reference since, and now, I get the privilege of sharing it with you all on today of all days, it’s my birthday!"

"The Medway Valley Line takes you on a tranquil journey through the Garden of England from Strood, which you may know from Southeastern Highspeed, and down via Maidstone to Paddock Wood & onward to Tonbridge. It’s something of a journey that time forgot, with many historical and natural features, grade-listed buildings and signal boxes which are still staffed to this day. Also included from Southeastern Highspeed is the stretch from Gravesend to Rainham, enabling gameplay to the likes of Hoo Junction and Gillingham depot - this section has seen significant uplifts compared to SEHS, and brings the route to a total of 26 new and 13 updated miles."

"Firefly have gone above and beyond at every turn, capturing the route to almost picture-perfect detail, it’s a wonder to explore. For PC players, all the level of quality you’re used to in the Fife Circle and WCML enhancement mods is present but dialled to 11 with the team having full control by making the route from scratch, which is now something Gen 9 console players can enjoy too!"

"The Class 375/3 is the primary traction on the Medway Valley Line and has been a key area of focus for the team, going the distance by implementing a more in-depth simulation of UK GSM-R (Global System for Mobile Communications - Railway)!"

"This allows you to both key in your headcode at the start of every service, and have a simulated conversation with the signaller when contacting them - you’ll even hear different voices based on the nearest local signal box. Alongside this, the 375/3 is getting a new sound set, full guard mode functionality, proper suspension support and of course on-board passenger announcements. All this can be enjoyed on the Class 375/6 which is also included, meaning both 3 and 4-car versions of the 375 with the old Adtranz-style headlights are available."

"Between Strood and Paddock Wood, one can look forward to a steady stream of half-hourly services based on the 2025 WTT, as well as extended Tonbridge runs and other alternative movements throughout the day. The Class 395 from SEHS, as well as the 465, play considerable roles to add life around North Kent, but also visit the MVL on occasions. The lineside industry in Aylesford, as well as Tonbridge West Yard and Hoo Junction, are sure to see plenty of freight action, and I for one am looking forward to the odd railtour or two!"

"From myself, who’s elated with the progress so far, and the Firefly team themselves who continue to work hard, we hope you’re just as excited as I am when their debut route, the Medway Valley Line: Strood - Tonbridge, comes to Train Sim World in 2026 (which just so happens to be the line’s 170th anniversary)!"

Thank you James, we'll aim to share more updates in the new year from their team as they continue to progress with development, and as as a bonus, please enjoy a route map diagram to help showcase what you can expect!

Get ready for more German traction arriving to Train Sim World 6 from the Dovetail Games team with the DB BR 147 locomotive, with a base timetable to support the upcoming Frankenbahn: Stuttgart-Heilbronn release and an additional alternative 2010 era timetable.

Enjoy current-day passenger services using the DB BR 147 from a modern cab, with a mixture of Dostos, n-Wagens and the WiKo.

These initial WIP screenshots are taken from our art teams as they continue to work on the modelling intricacies, and we'll be bringing you more updates, details and on-route screenshots as development continues in the coming months.

Next up, let's find our more on another project in-development from the Dovetail team!

Let's check back in on our new Metro North US route, where you'll be hopping abord the Metro North M8 EMU and exploring the Northeast Corridor - from Grand Central or New York Penn to Stamford!

We're exicted to show you all some of the first development screenshots now that track-laying is complete, and environment work is ongoing. Please understand that images shown here are very WIP, and may contain unfinished lighting or temporary floating development assets (looking at you, yellow triangle UFO!).

You'll be able to experience passenger services to both of New York's major railway stations, with Metro-North trains headed to Grand Central Terminal, and Amtrak trains heading to Penn Station, diverging at New Rochelle.

This route offers a huge range of variety, including local, express, and several semi-express patterns, trains which short-turn at New Rochelle or Harrison, and deadhead positioning moves.

Your next US adventure will come with 54 miles of track and 24 stations to explore as you travel, as well as additional Metro-North services playable on the Harlem Line and Hudson Line!

And in case you missed it, here's our route map we shared alongside the announce in our Dovetail Direct 2025 show!

Expect more updates and information from our development progress in the new year.

Announced back in October, the ATS team have been keen to keep us updated with new screenshots and information for their highly anticipated UK freight loco coming soon to TSW6!

The upcoming BR Class 90 will operate on the West Coast Main Line: London Euston to Milton Keynes route, with a new timetable and a range of five authentic liveries.

ATS: "We've developed deep simulation features for the Class 90, including a fully operational BIS, Working Datacord entry panel, and realistic Neutral Section functionality. UK Safety Systems are fully modeled, including TPWS/AWS/DSD, the new Working Speed Set feature, and Intractable GSMR radio."

"Additionally, we've also introduced Multiple Working capabilities, allowing for heavy-haul operations with other Class 90 locomotives."

We know many of you are exicted to see more and get your hands on this mixed-traffic locomotive, and we'll be sure to keep bringing you regular updates from the ATS team!

We've only showcased a limited selection of liveries in our screenshots, despite the ATS team working on 5 different variations for the Class 90 whilst our team confirm approval for licensed brands being shown. For an un-branded preview, take a look at what you can expect from this below overview image shared in our November Roadmap:

The ATS team also wanted to extend their support for the IMBUE group, who’ve delivered these liveries that complement the pack’s service mode, which was also made in collaboration teams at AND Games.

Finally, one last reveal for today - get ready for a beautifully crafted showcase video made by the Vector Simulations team, to get you all the latest development highlights for the first ever Czech route in TSW!

As a recap, hear more from the team on their October development details:

Vector Simulations: "Czech Safety systems - our locomotives come with LVZ and LS90 safety systems. Both of those look similar and in theory are, as LS90 is a newer version of LVZ. As this route in reality doesn’t use any code transmission systems, You will mostly use only vigilance features of those. But, we have also implemented outside forces, which can interfere with older LVZ even if there isn’t any code transmitted. So don’t be surprised when a red light on the repeater will flash for a second while You are driving near high voltage power lines."

"Demanding scenarios - this route will come with 7 scenarios varying from easy to really demanding. You will need to operate radios, couple trains together at Liberec yard, encounter multiple signalling and level crossing failures and even drive diverted container train."

Additional included with the release, you'll be able to dive into mutliple liveries for both the Class 750 and Class 843.

Please enjoy a selection of further screenshots we've shared over the last few months:

If you fancy catching up on our previous information shared from the Vector Simulation team, why not dive through our latest roadmap updates:

And that wraps up our second weekly drop, so stay excited, and get ready for a final drop coming next week on Monday, December 15th 2025.

Get your hot chocolates ready! Additionally this month, we’ll be running a special Christmas event, which are separate from December Mastery Challenges. This special event will come as 3 separate challenges (with rewards around three regions - United Kingdom, Germany and United States of America).

Here's a first look at the new posters you can unlock:

These seasonal posters run alongside the December Monthly Mastery. Each challenge is tied to a specific region, but once you complete a challenge on a route from that region, you’ll unlock that region’s poster and you can display it on any UK, US, or German route once earned.

UK Challenge: Unlock Christmas Tree Decals and the UK Christmas Poster.
    ▹ Tier 1: Drive 30 miles on and complete 2 timetables while the temperature is under 5C/41F on UK routes.
    ▹ Tier 2: Complete 3 timetables and a scenario/timetable after exceeding 100mph/160kph on UK routes.

US Challenge: Unlock Snowman Decals and the US Christmas Poster.
    ▹ Tier 1: Exceed 80mph/128kph and complete 2 scenarios or timetables on American routes.
    ▹ Tier 2: Drive 50 miles/80km and complete 3 scenarios on American routes.

German Challenge: Unlock 12 Days of Christmas Decals & the German Christmas Poster.
    ▹ Tier 1: Complete 2 scenarios and collect 3 collectibles on German routes.
    ▹ Tier 2: Gain 30,000 XP and complete 3 scenarios or timetables on German routes.

Each challenge is locked to a specific region. To unlock a poster, you must complete a challenge on a route in that region, but once unlocked, you will be able to display the posters on any route regardless of region. This means that a US region unlocks the US poster, but then you can display it in UK or German routes once completed.

Get started on these new mastery challenges today until the end of the year!

Wind back the clock to the year 2000 and experience Stuttgart before its big rebuild, carefully traverse the Enzbrucke prior to its 2006 replacement, and of course, experience it all from backdated motive power, with the all-new DB BR 140 to embark on hefty cargo duties, or regional services featuring the new Wittenberger Steuerwagen, powered by DB BR 111 traction.

Happen to miss our preview? Catch back up on our first showcase of the route on the TSW YouTube channels, ready for you to enjoy in your own time.

Our ambassador TrainSimPlay and developer Lukas will also be live tonight to showcase the Frankenbahn: Stuttgart - Heilbronn route in German, so be sure to join in before we head to release tomorrow!

Catch up with our Executive Producer of trains, Matt, for a special charity event showcasing the Jingle Jam content, playing across content in Train Sim World 6 featured in the bundle!

As a fun reminder, for owners of the Holiday Express: Runaway Elf add-on, you can utilise Free Roam to place any of your owned trains in the miniaturised environment, and transform them into toy-sized locomotives to experience the seasons, however you prefer to ride!

Join the Yogscast team for a touch of train simming featuring the TSW6 Jingle Jam collection, followed by other events that help showcase content in their charity bundle.

Find out more about Jingle Jam' and their charity partners on the Jingle Jam 2025 Website.

Don't miss our Winter 2025 survey shared last week, aiming to give our teams a greater understanding of our players and use data alongside your suggestions to guide us forward. It will cover your thoughts on Train Sim World 6 features, recent Add-ons releases, and then we'll look ahead to get your input for the type of content you want to see in the future!

This lets us build an understanding of every type of player who plays Train Sim World, and how we can make the best experience with features you want most. We've also spent time this year to localise our survey into German too, so that it better supports our german-speaking audiences when submitting answers to questions.

Please note, everything asked in our survey above is designed to gauge how players feel about new content, and about our games as a whole - it is worth nothing 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.

Thank you in advance for taking the time to share your thoughts, the survey should take around 30 minutes to complete in total and will close on midnight, December 14th 2025.

As part of this survey, we are also offering 20 lucky entrants a chance to win a TSW Add-on of their choice. We will contact the winners based on information submitted when completing the survey as an optional final step as a thank you for helping us build the future of Train Sim World. (Competition Terms and Conditions).

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.

Join us next Monday for the final reveals and updates before we close off for the year. Have a great week everyone!