skeletonbow: As a massive fan of the Star Wars flight combat sim games of the 90s, I can vouch for what others have said above. Both X-Wing and TIE Fighter originally shipped with one version of the game on GOG when it launched here, however based on customer feedback requests GOG and Disney brought the other versions of each game at a later date and now both games include all 3 versions of the games that existed in the 90s. Everyone has their favourite version of the game for their own reasons and now we have all of the versions.

In addition to that, the X-Wing Alliance last time I checked says that it does not support multiplayer, however other gamers have confirmed to me that it does in fact support Direct-IP multiplayer which works although I have not yet had the opportunity to personally verify that, but multiple people confirmed it so I trust them.

In short, the 4 Star Wars X-Wing/TIE Fighter games on GOG are the full set including all released versions in their full glory. When you buy either of the first two games, each one of them puts 3 games on your shelf reflecting the original floppy version, the CDROM version, and the Windows remake.

If you've read or heard otherwise in the forums or elsewhere, whatever information you read may have been correct on the date it was written, but it is no longer correct as it was enhanced over time to include everything, and I believe the store pages do state what all is included in the game at the moment. The only inaccuracy I'm aware of is like I said above with Alliance claiming no multiplayer when it does have multiplayer.

I've attached a screenshot of my Galaxy library showing the titles for clarity also.

Hope this helps.