Killer Queen Black works with a wide array of 3rd party controllers.

The default first party controllers supported out of the box are:

  • Joycons (Nintendo Switch)
  • Nintendo Pro Controller (Nintendo Switch)
  • Keyboard (PC)
  • Playstation Dual Shock 4 (PC)
  • Xbox One Gamepad (PC)

Confirmed Support Nintedo Switch Controllers

  • Nintendo Pro Controller
  • Nintendo Gamecube Controllers
  • 8BitDo SN30 Pro
  • 8BitDo SN30 Pro Plus
  • PowerA Enhanced Wireless Controlle

(Note: 8BitDo controllers may experience extreme lag in local wireless play, but work well for online play)

4 Players on Switch Joycons

In game you can hit L + R, then use the switch controller applet to assign the four controllers as you see fit.

source @Adam Liquid Bit#4392

Fight Sticks

Almost any fight stick that can connect via USB will work.

Here is a list of fight sticks we know for sure work:

  • Hori Fighting Commander (fighting pad)
  • Hori Real Arcade Pro 4
  • Madcatz TE, Mad Catz T.E.2+
  • Qanba Crystal
  • Qanba RAF4

Mixed Keyboard/Gamepad Play on PC

It is possible to have one player configured in settings for keyboard, and one on gamepad.

source @mrmango#4518 on Discord

Two Players On One Keyboard (PC)

It is not currently possible for two players to play on one keyboard, as each player must be assigned a single input device.

source @CrillFactor#0592 on Discord

...Other things?

Killer Queen Black is confirmed to support some unexpected controllers. For example, while the original message was lost, someone said that a Logitech USB steering wheel worked correctly, and @Brice#6819 confirmed that an X-52 flight stick functioned correctly.