Steel Artery: Train City Builder is a unique colony sim and city builder where your entire settlement exists on a massive train traveling through a steampunk fantasy realm. Developed by SoulAge23 and published by Crytivo, the game challenges you to transform the legendary locomotive Steelpolis into a prosperous mobile city, all while the crumbling Empire that created it struggles to survive. Each wagon is a new district, and your decisions impact thousands of autonomous citizens as you journey across distant provinces.
The core gameplay loop blends long-term urban planning with tactical resource management. Unlike static city builders, your train is constantly moving. You must stop in resource-rich areas to gather and process materials, then move on before supplies are exhausted. The game features vibrant pixel art and has been compared to a RimWorld-style colony sim set on rails.
A demo offering about two hours of gameplay is available now on Steam, covering the tutorial and first region. The full game is scheduled for a PC release in 2026. The developer has been actively gathering feedback through playtests and community updates to refine the experience.