With Train Sim World (TSW) moving toward high-fidelity graphics, many developers have left TS Classic. However, the modding scene for Indian content remains uniquely resilient. Why? Because TS Classic allows for "legacy" assets—old track textures, simple signalling scripts, and heavy CPU usage for large consists—which actually works better for the massive 24-coach Indian trains.
(often WIP or older quality):
Before installing these addons, ensure your system meets the minimum requirements: train simulator classic indian addons