Steam Controller - Gordon

The first Steam Controller is with the nickname Gordon.

Steam Input support

Yes

Linux Kernel Support

Yes, since 4.18 - hid-steam

Udev rules

# Valve USB devices
SUBSYSTEM=="usb", ATTRS{idVendor}=="28de", MODE="0666"

# Steam Controller udev write access
KERNEL=="uinput", SUBSYSTEM=="misc", MODE="0660", GROUP="input", OPTIONS+="static_node=uinput"

# Valve HID devices over USB hidraw
KERNEL=="hidraw*", ATTRS{idVendor}=="28de", MODE="0666"

# Valve HID devices over bluetooth hidraw
KERNEL=="hidraw*", KERNELS=="*28DE:*", MODE="0666"

What is the Official - Steam Controller: Gordon RetroDECK profile called?

Steam Controller - Gordon: RetroDECK: Steam Controller - Gordon

The hotkey button

The global hotkeys are activated by pressing and holding the HKB aka the HotKey Button and pressing the corresponing button togheter for the command you want to do. For the Steam Controller Gordon the HotKey Button is both SELECT and L4, you can press either depending on what you feel is more confortable.

Global Hotkeys: Steam Controller Gordon Button Combos

Function Shows what the hotkey does.
Button / Combination Shows the input you need to make to trigger the command.
Command Shows what is being sent to the emulator.
Emulator Support Shows what emulators support the command.
Comment Just extra comments.

Function	Button / Combination	Command	Emulator Support
Pause / Resume	`HKB + A`	`CTRL + P`	`RetroArch` `Citra` `Dolphin/Primehack` `Duckstation` `MelonDS` `PCSX2` `Yuzu`
Take Screenshot	`HKB + B`	`CTRL + X`	`RetroArch` `Citra` `Dolphin/Primehack` `Duckstation` `PCSX2` `Yuzu`
Fullscreen Toggle	`HKB + X`	`CTRL + ENTER`	`Citra` `Dolphin/Primehack` `Duckstation` `MelonDS` `PCSX2` `Yuzu`
Open Menu	`HKB + Y`	`CTRL + M`	`RetroArch` `Duckstation` `PCSX2` `Yuzu`
Quit Emulator	`HKB + Start`	`CTRL + Q`	`RetroArch` `Citra` `Dolphin/Primehack` `Duckstation` `PCSX2` `Yuzu`
Previous State Slot	`HKB + D-Pad Left`	`CTRL + J`	`RetroArch` `Dolphin/Primehack` `Duckstation` `PCSX2`
Next State Slot	`HKB + D-Pad Right`	`CTRL + K`	`RetroArch` `Dolphin/Primehack` `Duckstation` `PCSX2`
Increase Emulation Speed	`HKB + D-Pad Up`	`CTRL + 1`	`Citra` `Dolphin/Primehack` `Duckstation` `PCSX2`
Decrease Emulation Speed	`HKB + D-Pad Down`	`CTRL + 2`	`Citra` `Dolphin/Primehack` `Duckstation` `PCSX2`
Load State	`HKB + L1`	`CTRL + A`	`RetroArch` `Citra` `Dolphin/Primehack` `Duckstation` `PCSX2`
Save State	`HKB + R1`	`CTRL + S`	`RetroArch` `Citra` `Dolphin/Primehack` `Duckstation` `PCSX2`
Rewind	`HKB + L2`	`CTRL + -`	`RetroArch` `Duckstation`
Fast forward	`HKB + R2`	`CTRL + +`	`RetroArch` `Duckstation` `MelonDS` `PCSX2`
Global Radial Menu	`HKB + Left Joystick`		Opens the Radial Menu

The Global Radial Menu is activated by holding SELECT and by moving the Left Joystick, then by pressing L3 allows you press the selected radial button.

Check the Standard Controller: Radial Menu to see all the available commands.

Right Touchpad as Temporary Mouse

By holding HKB and moving the Right Touchpad you can use it as a mouse for various systems that uses mouse input.

Function	Button / Combination	Command
Touchpad as Mouse	`HKB + Right Touchpad`
Right Click	`HKB + L3`	`Right Click`
Left Click	`HKB + R3`	`Left Click`

Right Touchpad: Joystick Mode / Mouse Mode Switch

By pressing R4 and you can switch the right between semi-permanent Joystick Mode or Mouse Mode.
This function is useful for games that the primary input is a mouse as you don't need to hold either of SELECT or L4.

Example usecases:

ScummVM for point and click games.
Dolphin for Wiimote movement.
Lightgun games.
PC-Systems type games.

NOTE: That going into the global hotkeys mode above by pressing SELECT or L4 will switch the Right Touchpad to Joystick Mode again.

Function	Button / Combination	Command	Comment
Touchpad as Mouse / Joystick Switch	`R4`
Left Click - Mouse Mode	`R3`	`Left Click`

RetroArch: Additional Hotkeys

These hotkeys also work for RetroArch and are built in.

Function	Button / Combination	Emulator Support	Comment
Open Menu	`L3 + R3`	`RetroArch`

Arcade Systems: Additional Hotkeys

This hotkey work for RetroArch, MAME, FBNEO and other arcade systems.

Function	Button / Combination	Emulator Support	Comment
Insert Credit	`HKB`	`RetroArch` `MAME` `FBNeo`

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