FEdMode in game?

Is it theoretically possible to have FEdMode active during runtime? So that the player can select objects and move them around in the level?

I don’t think this would be possible. FEdMode is part of the UnrealEd Module and the EULA forbids using editor code in your runtime shipping product.

Even if this wasn’t the case it’s probably not a good idea. Editor Modes are integrated with the editor in a way which requires a lot of other editor stuff to run. Your game would bloat out of control with all of this stuff included. Plus editor code usually isn’t optimised for runtime performance.

You only need a very small subset of what an editor mode provides to do what your asking, it wouldn’t be difficult to make it in your game module. I think I’ve seen a tutorial for something like this someone, I’m sure if you search around you can find something.