Engines are the soul of a truck. Zeemod’s Realistic Engine Sounds and Kriechbaum’s Sound Pack replace SCS’s generic audio with recordings of actual Cummins, DAF, and Scania V8 engines.
Map mods double or triple the game’s playable area. The most famous is Promods. This massive mod pack rebuilds entire countries, adds remote roads, and improves existing cities. Other notable maps include: Mod Ets2 Galer
The public SCS forum is good, but the best "Galer" content is hidden in semi-private communities. Engines are the soul of a truck
Use ETS2 Studio (free tool). You design a skin in Photoshop or GIMP (using the DDS plugin), define the truck model, and export as an .scs file. The most famous is Promods
Realistic Brutal Weather and Next-Gen Seasonal Graphics change the skyboxes, rain density, and even winter textures (snow on roads).
If using Promods + RusMap, the typical order (from top to bottom) is: