GUIDE button: Steam Big Picture Mode
A Button: Space (Jump)
B Button: '.' key (Crouch) you will need to change one of the crouch keys to '.' in KF1 or whatever works best for you and make sure to change it in controller companion as well
X Button: R key (Reload)
Y Button: L key (Switch to last weapon) you will have to change this function to L key or whatever you like in KF1 and make sure to change it in controller companion as well
LB Button: G key (Grenade)
RB Button: Middle Mouse Button (Alt. Fire/ Flashlight)
Left Thumb: Shift key (Switch to knife) to simulate running/sprinting somewhat
Right Thumb: E key ( use/interact with environment) this key could probably be switched with crouch key
Dpad Down: Q key (Quick heal)
Dpad Right: Mouse Scroll, Up (Switch to next weapon) can use any key for this in KF1
Dpad Left: Mouse Scroll, Down (Switch to previous weapon) can use any key for this in KF1
Dpad Up: B key (Drop cash)
Left Trigger: Right Mouse Button (Aim down Sights)
Right Trigger: Left Mouse Button (Fire Weapon)
Start Button: Escape key ( Access main menu)
Left Stick: WASD keys (Move left, right, forward, and backward)
Right Stick: Mouse Movement ( Look around)

This is somewhat copied from the KF2 controller layout and hopefully someone finds this to be useful, however the secondary bindings are completely up to you. A big thanks goes out to my friend FRYEBALL for helping me set this up.

((COPY EVERYTHING AFTER "COPY BELOW' AND THEN GO TO PROFILES AND CLICK THE BOX WITH THE PLUS SYMBOL, HIGHLIGHT IMPORT THEN SELECT Paste 'KillingFloor'
it should show up and thats all you have to do))

COPY BELOW ----->

process: KillingFloor
title: KillingFloor
guide @ Launch Steam Big-Picture: cmd process steam://open/bigpicture
a @ Space: key Space norepeat
x @ r: key R norepeat
left shoulder @ g: key G norepeat
right shoulder @ Middle mouse button: mouse middle
dpad up @ b: key B norepeat
dpad right @ i: key I norepeat
dpad left @ k: key K norepeat
left thumb @ Shift: key LShiftKey norepeat
b @ .: key OemPeriod norepeat
start @ Esc: key Escape norepeat
dpad down @ q: key Q norepeat
right thumb @ e: key E norepeat
y @ l: key L norepeat
back guide @ Turn off controller: cmd turnOffController
back a @ Display second screen only: cmd process displayswitch.exe /external
back y @ Display PC screen only: cmd process displayswitch.exe /internal
back x @ Minimize all windows: cmd keyCombo LWin M
back right shoulder @ Open Task Switcher (Ctrl+Alt+Tab): cmd keyCombo LControlKey LMenu Tab
back dpad up @ Volume up: key VolumeUp
back dpad down @ Volume down: key VolumeDown
back b @ Escape: key escape norepeat
back right thumb @ Toggle help: cmd togglehelp
left trigger @ Right mouse button: mouse right
right trigger @ Left mouse button: mouse left
left stick @ WSAD keys: key W S A D norepeat
right stick @ Mouse movement: mouse movement
icon: 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