Just an FYI. Ps4 controller isn't detected with EW1 but works if you launch through steam. Works fine for EW2 although in both cases it only shows Xbox controller prompts.

Xbox controller works fine with both games on gog.

It does work fine if you're using DS4Win , however, there's a DS4 Win fork that people should use instead, its up to date and stuff.

Protip if you use DS4Win, make a new profile and make it so the right stick is the mouse instead of the stick, for some reason this game does the ''Square Deadzone'' (Aim and try to draw a circle, you won't be able to) and it's just so goshdarn raw, it's terrible, making it so the stick is the mouse you'll get smooth circular aiming, I have no idea why the game came out with that type of Deadzone other than incompetence or terrible design choice.