I still remember the 3 level demo CD they made. Awesome demo levels that made me buy the game, which is still one of my favorite games of all time.
Maybe I need to re-download it, and check out the differences. I remember playing those six missions so many times before eventually saving up enough pocket money to buy the game, but I don't exactly remember them being different.
And it's actually six maps, three for each faction.
[1] https://www.mobygames.com/game/57961/warcraft-ii-tides-of-da...