Valve Steam Controller

Steam Deck FAQ confirms you can use it as a giant PC controller

Valve say 48 million players have used a controller on Steam

Steam Controller?

Gamepad Controller Mods: Elevate Your Gaming Experience

Steam Community :: Guide :: How to set up an Xbox Controller

【Steam 日本語対応】　Steamおすすめ戦略シミュレーションゲーム・RTS - Game-Play360

All Steam Users Can Now Play Games Using a PS5 DualSense Controller

Valve's Steam Machine controller attempts to change the game - Video