You are right that multiplayer arena FPS with a vibrant community is a rarity now. I think the most popular one is Splitgate (sitting at ~600 players ingame on

You are right that multiplayer arena FPS with a vibrant community is a rarity now. I think the most popular one is Splitgate (sitting at ~600 players ingame on steam right now)[1]. Xonotic seems to be semi popular too but not on Steam if that matters to you. Part of the problem is many of the modern FPS games have adapted arena FPS features (even Halo now is much faster than it used to be) making it difficult for people to go back to them unless they were deep fans of arena FPS games in the first place. Ultrakill is a great one for singleplayer though! [1] https://steamdb.info/graph/?tagid=5547 https://steamdb.info/graph/?tagid=5547