I'm looking for recommendations re good online FPS game(s).
I played Cube 2 Sauerbraten for quite a few years but sadly the community went into significant decline. It's still active, but nothing like it once was. However, it does offer Insta, Regen and map developing/modding.
If your into a different approach to the FPS try War Thunder. Its based off of planes from 1928(ish) To the first air to air missile kill (mid Korean War, definitely Pre Vietnam) You play as your chosen Aircraft, its quite fun, and I'd be happy to help you out in game if you'd like. warthunder.com