Does the Original Xbox 360 Controller Work on Xbox 360 Slim? Yes

Yes. All original Xbox 360 controllers (wired and wireless) are fully compatible with the Xbox 360 Slim (S and E models).

Details

• Wireless: Syncs the same way (press sync button on console + controller).
• Wired: Plugs into any USB port on the Slim.
• Play & Charge Kit / Battery Packs: Work identically.
• No Firmware/Driver Differences: The wireless protocol is unchanged.

One Minor Note

The Slim uses a different proprietary power brick, but that doesn't affect controller operation. If using a wired controller, any standard USB cable works.