Who would’ve known that a little googling can help you … So as we all know MX Bikes has no native control setting to re-map the ESC key. If you still want to pause the game mid-air to scratch your nose (seriously you can do that while whipping) here’s the solution: Get AntiMicro from Releases ..
3 Some people might have experienced a weird behaviour when launching MX Bikes via Steam and playing with e.g. a Dualshock or Xbox Controller. This is due to the override function of Steam its Big Picture mode, as it simulates the detected controller as a mouse, which disables the ability to control the in-game movement. ..