Steam Deck natively recognizes the PS3 controller. Simply plug it in via USB, wait for Steam OS to recognize it, then unplug USB cable and it will work over Bluetooth without needing
Is dualshock 3 still enough for todays PC FPS games? : r/PS3
How To Connect PS3 Controller to PC on Windows 10: Quick and Easy
PS3 Button Map - Unity Forum
If you want to use your PS3 controller as a Xbox or PS4 Controller, read this · Issue #40 · nefarius/DsHidMini · GitHub
How To] Connect PS3 Controller To PC On Windows 10 (SCP DS3 Method) - YouTube
PS3 Controller with Windows | Austin Tate's Blog
How to use a PS3 controller on PC [Windows 10 Guide]