Major events like the Steam Winter Sale often feature discounts of up to 70-80% on TSC routes and locos.
Several years ago, there was a tool known as the or "Koalageddon." These are generic Steam DLC unlockers that work by emulating a Steam ticket. However, with Steam's updated inventory systems and the specific way Train Simulator Classic loads assets, these tools often: Train Simulator Classic Dlc Unlocker