Since there’s a lot of discontent with the current (and previous) chapters of the Age of War, i’ve put up a guide on Steam on how to download a previous iteration of the game.
As it was the last build with the old combat system, it focuses on Age of Sorcery: Chapter 3.
You can find it here:
Please note that it’s not complete, I hope to add some more build id’s from previous chapters and pre-bazaar over the weekend when I have the time.
I once tried to install a standalone version of a game from three years ago. I tried to download versions of mods from that time. Half didn’t work. So in your case, modern mods are unlikely to work on the old version.
Updated, now includes id’s for all previous AoS/AoW chapters as well as the last build prior to the introduction of the ‘new’ Bazaar/Battle Pass system.