@tk Games are supposed to still work, yes.
In practice it will depend on the game: On X there are like five different ways to implement each feature a game may need. Some of those may be a bit hacky and won't work smoothly on a Wayland desktop.
From what I understand though, valve has put in some effort to make it as smooth as possible.
I myself don't play games anymore, so I can't share any first-hand experiences.
But you can install a wayland desktop alongside your current and just try.