In the original Age of Empires II I built armies with more units than the game allows to move at once (40), even in the early campaign missions. Has this limit been increased in the HD version?
In the original game, you can only move up to 40 units.
In the HD version of the game, this number has indeed been updated. You can select and move up to 60 units at the same time. It used to be 200 in the public beta of the 2.4 patch, but it has been quickly lowered to 60. There is no real explanation for that, but main suspicions is about path finding being too complicated to calculate, while other think it could be because of the game balance itself.