[WorldMaker]

Hashing .exe names is way too much work. Since Vista Microsoft has provided an opt-in way for a game installer to optionally flag "Hey, I'm a game". This was used for the mostly useless "Games Explorer", but also little bits of other functionality.

Also, the Microsoft Store has an entire category called "Game" and can just use that.

Worst case though, by "game" it might just use the Window's Xbox app's determinant for shortcuts like Win+G which is essentially, from what I gather, "Does it use DirectX? y/n".