Damuna: I have no idea what "Mac comp" and "Linux comp" are referring to, so that needs to made clear. Also, we need GOG publisher and GOG release date, I think. Extras and languages should be at the bottom, because they will potentially take up a huge amount of space.
Comp. means compatibility. Ideally there will be also extra pages that list all compatibel games later.
Should we put extras maybe out of the box into an extra section, so that we can be more detailed on those?
I agree on the rest.
Damuna: Compatibility is probably too much of a complex issue to tackle in those boxes - I'd say we should detail that in the main page body. If we're going to have a section in the info box, let's just have one and list OSes.
Maybe a Yes/No in the boxes for the quick glance and the guide, more comprhensive information in the main body ... but I'm not so sure myself ....
edit: Yeah, a list of OS would be better