abelthorne: Saying that Linux users don't need Linux packages isn't a proper answer. After all, we could say the same thing for DOS games: just download the Windows version and run it through DOSBox. If we reason like this, there is no point in adding Linux support at all on GOG for (good) old games.
1. Linux support is all fine and dandy. But face it, not everything is going to get a release on linux. Either the souce code is long gone, or In the case of SS2, it would take a complete, from the ground up, redesign of the new dark game engine. Some things just aren't built with unix/linux in mind, such as use direct X and not openGL. I'm a mac user myself, and I always have to find a work around. It's part of the price you pay for a non-windows system.
That is why Gog bundles SS2 with wine.
to the average user, there is little difference. If gog and steam use an interpreter/emulator, It is entirely in the background and you would never notice.
2. Dosbox is not a windows emulator. You can install win 3.1 on it , but It is so involved i would not recommend it. A program like oracal's VM box is much easier for that sort of thing.
Dosgames are always bundled with dosbox, no matter what the system.