Hi,

as I'm browsing in the GOG catalog I focused the need of another filter to reach games that are of interest to me.

In specific I'd like to filter all games that are DOS based.

Up to now all games report "Windows...." but that's is only supposed to be what OS DosBox support.

Why don't add a "Dos Game" filter?

I think your best bet currently would be this gogmix, which seems to be up to date.