Valve's Steam Controller Prototype Hands-On at GDC 2014 - YouTube
Yakumono on X: "Random reminder of the day: This prototype controller was NEVER a SNES CD Playstation controller. It was for the PS1 as we know it. https://t.co/Y8E9xivD1l" / X
Xbox One Prototype Controllers : r/xboxone
eBay Watch: Another Prototype Controller, This Time For M2 | WIRED
Xbox Controller Prototype by CNC milling & 3D Printing
How to design a gamepad: A look at Valve's Steam Controller prototypes | Extremetech
Retro-Bit Showcased A Ton Of Great Controller Prototypes And More At This Years E3! — GameTyrant
Steam Controller "Chell" Prototype found at local Goodwill : r/SteamController
Steam Community :: Guide :: Configuring the Prototype Steam Controller Binds
Get a look at this incredibly rare N64 controller prototype | Eurogamer.net
Valve Steam Controller review: Valve's new Steam Machine controller keeps touch pads, adds face buttons (hands-on) - CNET
The recently revealed original Xbox controller prototypes keep up a fine tradition of absurdity | Eurogamer.net
Playstation 1 PS1 Prototype RJ11 Telephone Jack Controller RARE! | eBay
Xbox Controller Prototype by CNC milling & 3D Printing
Ben Heckendorn on X: "Prototype finally done. Single handed PS4 controller using the Hori PS4 mini controller. https://t.co/1nNsP4Jbz5" / X
Valve's Steam controller prototype now looks more like your father's controller (pictures) - CNET
A Look Inside a GC Controller Prototype – The GCC Library
Steam Controller prototypes : r/Steam
File:Nintendo-GameCube-Dolphin-DS5-Controller-Prototype-FL.jpg - Wikipedia
A new direction for game controllers | EurekAlert!
Hands on: Valve Steam Controller prototype | Digital Trends
Here's the latest Steam Controller prototype - GameSpot
Prototype Xbox One Controller Emitted Smells - The Escapist
GDC: Hands-on with Valve's Newest Steam Controller Prototype - IGN
Xbox One's Prototype Controllers Revealed - IGN
