We don't know how much it cost, but it does apparently work.

An old pre-2015 Steam Controller prototype was just found at Goodwill, and they're still compatible to this day.

Whether or not Valve's Steam Machine changes the way we play PC games, the box is more or less a traditional PC that's about the size of a large game console. The Steam Controller, however, is ...

Prototype controllers can go through dozens of iterations before a final design is decided upon. Here is a look at some of the wackier designs. These are all pretty unknown, so hopefully you find some ...