Spent a day on opengameart.org looking for high quality 3D models for medieval settings, these were some of the most highly recommended (and most downloaded) models and model sets.

Note: Most of these are going to be Blender files – fortunately Blender is free to install and use and there is a huge community supporting the software. You should be able to easily find a good tutorial on exporting files from Blender for use in Unity, Unreal, etc.

From Daniel Andersson:

 

From Ron Kapaun :

 

From Duion:

 

From Clint Bellanger:

 

From Iconoclast:

  • One damn fine Covered Well 
  • License Information: CC0 Public Domain, free to use without credit (though it’s always nice if you do).

 

Reminder: Most of these are going to be Blender files – fortunately Blender is free to install and use and there is a huge community supporting the software. You should be able to easily find a good tutorial on exporting files from Blender for use in Unity, Unreal, etc.