Sadly, it’s not the “PC Game Gun”. Instead, it’s been announced today that most of Valve’s shooters will be compatible with Novint’s Falcon peripheral.
https://kotaku.com/the-game-gun-guy-as-lovable-as-he-is-crazy-5300550
All games included with The Orange Box – those being Half-Life 2, HL2 Episodes 1 & 2, Portal and Team Fortress 2 – will now work with the novel controller. And Valve’s other big shooters, like Left 4 Dead and Counter-Strike, will “soon” be supported as well.
If that sounds just too awesome to resist, Valve and Novint are offering an Orange Box bundle over on Novint’s site, where for $149 you can get a Falcon and The Orange Box.