When a friend showed me codingame, i was reminded of an old programming game we played in our company around 2000: RealTimeBattle - http://realtimebattle.sourceforge.net/
The codebase is very old, and is (at least on my debian jessie box) not compilable anymore. I was glad to find out that a coder named "mdtrooper" started a fork on github.
Unfortunately im not able to help with it, as i am limited to Perl/Bash language (I just started to learn golang...), but maybe one of you guys would like to submit something
The Repo URL: https://github.com/mdtrooper/RealTimeBattle_reloaded
Additionally, i would like to show off a 1st draft of my realtimebattle online arena: https://rtb.m1nd.io/
There, you can submit realtimebattle robots, and let them fight against other bots
Its currently work in progress. You can already register and submit a bot, but the actual fighting is not done yet. I plan to have it working by the end of this weekend. (Actually, the isolated vm i use for rtb is already running, i only need to transfer results back to the db, and create a result table)
Thats all for now, have a nice weekend & happy hacking