That’s why i suggested taking a look at Day of Defeat.
Use the best maps as reference (dod_donner or dod_anzio for ex) and release as a small test.
It’s easier and faster than release a large map and they can use what they already have done.
Just a suggestion by who played it for 6 years straight… being a part of a huge community that still “fights” to play it until today.
The game was fun and gave us a way to make fun and sponsored competitions around it.
It’s almost lone fighters, but in a small and well planned map.