Widely considered the "ultimate" car-building simulator with extreme detail and survival elements.
If you are looking for a more robust "constructor" or car-building experience, consider these alternatives: car-constructor-pc-game-free-download
“it is a complete travesty that this game doesn't change handling, weight, or anything for the parts you can remove from your car... no plot, no stakes, no simulation aspects, no racing, no online, no bots.” Steam Key Gameplay Highlights no simulation aspects
It includes a "realistic" mountain track and various road surfaces intended to test your car's physics and tuning. car-constructor-pc-game-free-download