Switch Pro Controller Shoulder Buttons Won't Work for Death Stranding on Steam

 Death Stranding has some finicky controls, and it's impossible to play unless you're able to use the trigger buttons to steady yourself. Unfortunately, there's an issue with trigger buttons being completely unrecognised if you're playing with a Nintendo Switch Pro Controller via Steam.

To fix it, right click on the game in your library and go to manage controller. It should be using the official layout, as shown below.

Click on edit layout, and then on 'triggers' in the list on the left.

Here's the problem. The game knows the left and right shoulder buttons are supposed to be the left and right triggers, but this layout isn't telling it how to do that. Click on 'add command' and then on 'mouse' along the top.

Set both the 'right trigger' options to right mouse click, and both the 'left trigger' options to left mouse click. You're telling the controller that, when you press those shoulder buttons, the game should do whatever it would do if you clicked the left and right mouse buttons. Which is what you want, since those are set to the trigger buttons.

Voila. Go ahead and transport those corpses to incinerators. It's a lot less unpleasant when you're not falling over at every step.

Edit: Unfortunately, I have so far not found a solution for vehicles, so I'm having to reluctantly switch to using the keyboard when driving.