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You guys helped my son build his first PC and he just finished it. Thank you!(r/pcmasterrace)
Be warned. A wireless 360 controller with the charging cable will not work. You either need the wireless dongle ($12 on amazon IIRC) or one of the wired controllers (where the cable cannot be disconnected). Rocket league is great fun though!
here it is: The dongle allows up to 4 360 controllers to be connected to the PC at once.