Is it possible to play external FBX files with animation?

Hello.

Is it possible to play external FBX files with animation?

Now I am thinking - is it possible to make game with mods support, like in Sims 3.

In Sims 3 possible to make game mod package with standalone animation file…

Can it be realized in UE4 - loading external animation file to the game, for example on game startup?