Thanks, it's a G4 ibook, OS 10.4.11, and my keyboard works fine for everything else. Except Avernum 5 demo the keys also don't work. But they did before. I haven't opened it in some time until today.
I have the Avernum 4 demo, but it doesn't recognize the keyboard at all. I can't use the keys to move, or even to type names or saved games. I tried restarting it and even re-downloading it.