This is the Steam icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
It's the outline of the Steam logo, drawn inside a square with rounded corners. It looks like the Steam logo, but drawn as the outline. It looks like a bicycle chain link drawn diagonally with a line coming out of the lower part of the link.