Looking at the current categories, Arcade and PC are the only ones that haven't been broken down into sub categories. Arcades don't really need one that I can think of, but I can see how it might be relevant to PC's, at least as far as including a section for free indie games and maybe a Steam category, considering that Steam will soon be releasing their Steam Link and Steam Machines to support games included on their site.
Right now we allow for unlicensed / hacks for consoles, but nothing for free indie games (that I can see) for PC's, and yet there are plenty that would appropriately fit this category (between RPG Maker games, Unity, Game Maker, and many others), some of which have been well-received throughout the internet. A couple quick prime examples:
Super Mario Brothers: The Seven Sages - https://www.youtube.com/watch?v=f6X0vcNMHOg
Return to Sector 9 - https://www.youtube.com/watch?v=TWxCRATRkKY
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