ATV desperately needs some sort of a physics rework, currently it behaves horribly, especially on steep cliffs and ESPECIALLY when pressing shift to accelerate. It sometimes just randomly spins in place, even on pretty flat terrain. I've experienced multiple cases of the ATV randomly turning in one direction and crashing into a tree, sending me flying or even worse, leading to a fatal crash. Please look into that, the vehicle is barely usable right now. Maybe implement an upgrade system, so you can buy some new ATV parts which you have to manually install (something similar to the mining station) that increase its stats, like fuel capacity, max speed and steering responsiveness.