In the list it says Sanatarium runs with dosbox, but it should say Wine. Also, i didn't get it to start using the gog starter, but it runs fine when running the original exe.
Oh good, finally a confirmation of this. I tried the demo the other day, it worked fine under Wine, too.
Fullscreen or windowed?
Both - although it makes much more sense to have it set fullscreen, and set your virtual desktop to whatever window size you'd like to emulate the "window" function.
Very nice, could you share the technical details with us (kernel version, Wine version, what options in Wine except for emulating the desktop if any), since some people are unable to run it at all or at least not in fullscreen? Outcast seems to work fine.