Not sure if anyone played this but Urban Terror is an old 1999 mod for Quake 3. It is still being worked on by Frozen Sands to this day and it still an awesome FPS.
Now they are making Urban Terror HD which is totally made on UE4.
http://www.urbanterror.info/news/cats/urthd/
UTerror has always had an extremely active mapping community, and for those of you making maps in UE4 but not wanting to make Unreal Tournament stuff... well here you go!
The HD version is in Alpha, but the "old game" is totally free and most maps are quite enjoyable. So you can download UTerror 4.x and give it a whirl.
[Blocked Image: http://www.urbanterror.info/cache/images/texts/news/454.2.jpg]