This game has a LOT of real-life physics built into it, check out their "inertia" system, the way mass resists movement and how it affects the way our bodies accelerate when running:
https://scumgame.com/2017/01/27/inertia/
(also remarkably the same name as one famous Steemian...)
I'll wait for the final release.. but looks too complicated to play casually lol