https://www.pcgamer.com/quake-3-bots-play-450000-games-of-capture-the-flag-learn-to-beat-human-teams/

Is this the beginning of the end for humankind? Robots have now surpassed human-level competence in a stripped-down version of Quake 3 Arena's Capture the Flag. 

Similar to the OpenAI Dota 2 bots that aim to "beat a team of top professionals" at The International, Google's DeepMind has used reinforced learning to teach artificial intelligence the multiplayer mode. The bots are said to have played 450,000 games against themselves, each lasting five minutes within a procedurally generated map. My crude calculations peg this at 37,500 hours.