Can I use my personal regular 3.5mm headphones with a PS4 to listen to in game audio through the Dual Shock or remotes?
For the PlayStation 4, you can just use a regular set of 3.5mm headphones to hear game audio through the port on the DualShock 4.
To do so, from the PS menu, go to Settings > Devices > Audio Devices > output to Headphones > With your headphones plugged in select "All Audio" as opposed to "Chat Audio." You can also adjust the volume from Audio Devices > Volume Control (Headphones).
I found the steps slightly different to the answer from @Teryx, maybe due to a later software update? This worked for system software 2.04:
First plug in your headphones to the DS4. Then:
Settings > Devices > Audio Devices > Output Device.
That should be set to "Headphones Connected to Controller".
As @Teryx said, on the same screen, > Output to Headphones should be set to "All Audio"
Connect the headphones to the controller and hold the PS button on the controller. Settings will appear on the screen, set to "all audio".