Yeah I just installed retropie on my raspberry pie and my Gamestop third party xbox 360 controller (I not 100% sure a third party controller works so I can still return it if I have too.) does not work any time it loads a game. This is confusing to me because it works fine throughout the menus. Also I have installed the xbox 360 drivers from the setup screen but still have this issue. Also the green led is blinking on all 4 player positions instead of just 1st player so that may help. Also I’m not a Linux pro so easy to follow instructions would be a great help. Thank you for your time.