Mostly games that lack gamepad support.
That includes older games and many indie games.
I've played Cassette Beasts, Dead Cells and Asphalt 9 with it.
You can:
- Change the controls in-game, if the game supports it.
- Change the mapping in the source code and build the server yourself.
With a bit of remapping, almost everything is playable.
The server will eventually have a GUI for changing the mapping.
We now have partial remapping support on the server.
As soon as I have time to work on it. :)
If you want them sooner, you can contribute to the project.