The 2013 reboot of fighting game Killer Instinct on Xbox One has proven a popular game in the modern e-sports arena. While it successfully revives the long-dormant franchise from the Super Nintendo and Nintendo 64 era, it also introduces a new approach for fighting game AI. The Shadow Mode system -- a free update released in season 2 of Killer Instinct in 2015 -- allows for players to construct AI-driven fighters that are designed to match your own capability when playing as a given character. After spending three training sessions in the dojo, your shadow AI is capable of replicating a portion of your behaviour: with many of your strategic decisions being mapped to the non-player character. Once established, your shadow can be sent off to fight your friends or other players on Xbox Live.

The Xbox One X is the ultimate video game system. It sports more horsepower than any system ever. And it plays more titles in native 4K than Sony's PlayStation 4 Pro. It's just about everything you could want without investing in a gaming PC. It's now been a year since the PS4 Pro launched, and the One X costs $500, while Sony's console launched at $400.