Ok, it works fine for the most part but I can't switch ammo type in the weapon wheel during gameplay.

Please fix it because this issue affects gameplay. THank you.

Alpha Protocol only supports xinput controllers(Xbox 360, Xbox One). PS4/PS5 use directinput; which could lead to shoddy compatibility. Try to download DS4 Windows https://ds4-windows.com . This program basically makes windows think that your ps4/5 controller is an xinput controller. I hope this helps!

Also, if you have Steam, you can add it as a non steam game on Steam and launch it from there. Steam will emulate a directinput controller into xinput.