Windows 7 64bit or Windows 8 64bit (tested on 4 PCs) Unity 4.5.4 In editor: With two original Xbox360 controllers attached, everything works (almost) ok Build: Triggers seem to be inverted (pad1 <-> pad2) and they don't respond correctly (mainly they don't work at all). Searching internet I just found that this bug is old and hasn't been fixed yet !!??!? http://www.gallantgames.com/posts/27/details-on-the-xbox-360-controller-bug-in-unity I tried with two xBox one controllers (wired) simultanely using this driver: http://majornelson.com/2014/06/05/pc-drivers-for-the-xbox-one-controller-available-now/ Same bug. I guess then that is not related to 360 drivers but it happens when two or more identical controllers are plugged in, infact using a 360 controller and a ONE controller together works perfectly. (although often it finds a phantom device). DEAR UNITY SUPPORT, I KNOW THERE AREN'T SO MANY CO-OP GAMES MADE WITH UNITY, BUT THIS IS A SERIOUS BUG FOR MANY PPL AND YOU SIMPLY CONTINUE IGNORING IT... P.S. The two pads works correctly in other games...therefore it's a Unity problem.