No matter where you download the mod files, you must have the base game Attila: Total War installed and playable. And since Attila is a Steam game (DRM-protected), you cannot launch Attila without Steam running—unless you use a cracked/pirated copy of Attila.
So, "without Steam" actually means two separate things:
We will address both cases, but be aware of the legal and practical consequences.
One of the easiest ways to download Medieval Kingdoms Total War 1212 AD without Steam is through a digital storefront like GOG (formerly Good Old Games). GOG is a popular platform that offers a wide range of games, including Total War titles. medieval kingdoms total war 1212 ad download without steam
To download Medieval Kingdoms Total War 1212 AD from GOG:
Technically, yes. But with major caveats.
Creative Assembly distributes Attila: Total War exclusively via Steam (and a few legacy physical copies that still activate on Steam). Consequently, the official mod distribution channel is the Steam Workshop. No matter where you download the mod files,
Why mod developers prefer Steam Workshop:
The official developers of 1212 AD (the "Italian Twelve" team) only officially support the Steam Workshop version. Their Discord, ModDB page, and forum threads all redirect to Steam.
Many users hope that Attila: Total War will come to GOG (DRM-free) or Epic Games Store. It has not. Attila remains a Steam-exclusive title. Even physical copies activate on Steam. We will address both cases, but be aware
Thus, there is no legitimate DRM-free version of Attila, and therefore no legitimate way to play 1212 AD without Steam.
If you own Attila: Total War on Steam but want to download the mod manually (e.g., you have slow internet and want to use a download manager, or you want to back up the files), here is how.