Yo, so that’s it, there are many shooters made with Unreal, but I can’t find any granting modding possibilities, I am trying to build my portfolio of Level Designer, so I’d like to be able to mod with Unreal a game, preferably a shooter 
Unreal Tournament?
there’s Squad (for which I found the editor loading times unusable and it would crash on play anyway), and there’s also Ark
Insurgency: Sandstorm is supposed to add editor/modding capabilities eventually too