Rust

You can play the game at oort.rs. I've found it quite addictive so far. The link in the post is a writeup of the most recent tournament results in the single fighter category, which seems to be the main category being played at the moment. I think now is a good time to get into it as no one has perfected a strategy yet and even the first place AI still crashes into the arena walls sometimes. 😅 There is an active discord server (yeah, I know 😬) with a small but nice community :)