Derail Valley Update — Mod Compatibility Status & Broken Mods List

Hi everyone! We have a couple of items to discuss today: reporting on the progress of our next major update; taking part in Train Fest 2026; celebrating 10 years of Derail Valley development and; announcing a major update to our soundtrack. Let's dive right into all these:Steam is launching a new event today - Train Fest 2026! Being strictly focused on trains, it could put Derail Valley in front of many eyes that have never seen our game before. To that end we're taking part and are running a special -25% discount for the next 7 days.Make good use of this discount, because we rarely run them. In fact, we've only had one before - when we entered the B100 development era, knowing that it would take a long time.B100 - In Early DevelopmentWe've been developing Derail Valley for almost exactly 10 years now! It's in great shape nowadays, yet our 100th build, that we're currently working on, will be the game's biggest update by far.We're only scratching the surface of it today, so please bear with us. It's still the early days of B100 development, and we aim to finish it by the end of 2027, or possibly a bit later. Please keep in mind that with the complexities involved it is impossible to predict a specific time frame, and the update could end up being pushed further. There is no release date yet.The high-level vision for B100 has been laid out on our public roadmap. However, with these progress report posts we want to reveal some more detail and specifics, as we get closer to the release. Things discussed here are mostly heavily in development, or finished but still require extensive work to integrate into the game:(you can click images, or open them in a new tab, for high resolution)WE6-960 Electric LocomotiveOne of the most exciting additions to Derail Valley in B100 will be its first proper electric locomotive, powered by an overhead line! WE6-960 will be a large, late-game, dual-cab locomotive. Rated for 2000t of freight haul, it will pair excellent visibility with immense power. The main caveat though - it is constrained to overhead lines.The new WE powertrain (short for wire-electric) is an intricate simulation of the 3 kV DC electrification system, which we chose for the most interesting gameplay. In true Derail Valley manner, it has a perfect balance of realism and fun. Driving electrics will keep you busy, carefully managing temperatures of both the traction motors and the rheostat, while needing to balance rheostat bypass positions, field weakening, voltage drops, substation transitions, and other quirks unique to this powertrain type.If these terms don't sound familiar, don't worry - the electric locomotive will be quite easy to pick up, despite being different from diesel and steam. Mastering it with extremely heavy loads, however, is where your skill and knowledge will be put to the test.Overhead line equipment will be prone to damage, and to make it operational again you'll need to pay to fix it. You'll also need to pay for used electric