It varies quite a bit, and there are some items that are pretty minor that will cause a game to not be officially verified. For example, some of the 2D Final Fa

It varies quite a bit, and there are some items that are pretty minor that will cause a game to not be officially verified. For example, some of the 2D Final Fantasy games run very well without any issues on the Steam Deck, but are only listed as playable because they require the use of the on-screen keyboard to enter in character names.