To me, it has to be Gordon Freeman. He represents Valve, and I can’t think of a gaming company more linked to PC gaming than Valve.

I adore king’s quest, space quest and all these classics. Same with Monkey Island, but when it comes to… Well, mascot sounds wrong. Figurehead may be better here, I think Gordon’s ties to Valve gives him a pretty strong case for PC gaming icon.

The goose from untitled goose game doesn’t feel like a PC gaming mascot to me since it’s a single game that’s also on almost every console.