

You should explain that to the few Steam games I have that work just fine on Mint, right out of the box.
It’s hit or miss and depends on the game, and OP didn’t really give us much detail. There’s just no absolutes is ultimately the lesson to learn, which is why a dual boot option might suit them best.
No contest, Frank Reynolds would smoke the Penguin and offer him a cooked penguin egg in these trying times.