December Developer Letter

It’s December already! 2025 is racing toward its end. To all the Conductors around the world who love the Frostrain series—did you have a good year? We certainly did, and we’re running full speed ahead toward our Early Access launch this coming January.

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Oh, and by the way—Demo version 0.7.0 has just received a major update. Please give it a try and take a look at where the game is headed! It has changed a great deal compared to before.

The demo will be closed before January 9, so please keep that in mind. Thank you!

Improved Clarity

Today’s work on improving clarity continues!

When large amounts of Happiness were lost, the visuals often appeared as awkward, rectangular pillars. To address this, we’ve changed the presentation so that Happiness now appears to “collapse and crumble” as it’s lost. Why is this an improvement to clarity? Well… since it’s something you’re losing, having it fall apart feels appropriate—maybe that explanation is a bit forced? Haha.

This definitely counts as improved clarity. Trains that produce more Happiness now also grow larger in size. Still not sure what we mean? Take a look at the engine train at the very front. Don’t you notice that some trains are clearly bigger now? If you want, it’s even possible to make your train absolutely massive!

Synergy Overhaul

A large number of synergies have been reworked.

Many synergies felt like they were all about “stacking up” from the very beginning, so we wanted to ease that feeling a bit. As part of this, we adjusted the Red Frost Knights’ Tier 4 synergy. Previously, it removed the cap on Training, allowing it to stack up to 500%. Now, it immediately grants an additional 300% Training instead. Combined with the clarity improvements mentioned earlier, its impact is now much easier to grasp.

In addition, the Guild of Explorers, the Press, the Shadow Traders, and the Children of the Engine have also been reworked. Let’s boldly cut out boring or flavorless synergies and replace them with something fresh and fun!

Game Summary

After a run ends, you can now review detailed information about that game.

See which artifacts and combinations led you to victory, what outcomes you achieved, and which artifacts or trains generated the most Happiness. Personally, I find this moment of looking back on a completed run extremely enjoyable.

Renewed Decisions

The experience we aim to deliver in Frostrain 2 is that of truly becoming a Conductor within the world of trains. Each character faces different circumstances and overcomes them using different tools. Reflecting this goal, we’ve completely refreshed all Decisions with new content.

For example, the strict Academy-born Conductor Choi Sun-ja approaches Decisions through a technical and scientific lens, while her personal circumstances surrounding the Shanty Carriages form another major axis of choice.

Players can now choose to completely reject the Shanty Carriages—or embrace them and grow even stronger because of it. Everything is in your hands!

Future Plans

After launching Early Access on January 9, our goal is to reach full release in the first half of 2026. While the Early Access version already offers plenty of replayable content, we are not satisfied stopping there.

We plan to add two new Conductors and two new maps, along with dozens of new events and landmarks, over 100 additional Decisions and artifacts, a hard-mode equivalent called “Frost Mode,” and a new system to unlock all of these features.

Throughout this process, we’ll be actively listening to your feedback through Steam discussions, Discord, and email—and reflecting it in development. Please help us make a better game. Frostrain 2 is, in many ways, a collaborative creation between us and all of you 😊😊

We’ll be back in January with even more exciting news and updates. Thank you!

Sincerely,

nemonan.