https://www.theverge.com/2018/5/4/17315834/star-wars-jedi-challenges-lenovo-mirage-two-player-lightsaber-duel-update

If you own one of the augmented reality lightsaber kits that Lenovo and Disney started selling last year, you can now have duels with your friends — as long as they have a kit, too. Star Wars: Jedi Challenges is getting a free update called “Lightsaber Versus Mode,” adding local multiplayer to the previously single-player game.

Versus Mode requires two of the $199 Lenovo Mirage AR systems: two phone-powered Mirage headsets; two lightsaber controllers; and two light-up tracking beacons, each set to a different color. Players stand a few feet apart, like they might in a real duel, and the headsets project a lightsaber beam over each of their controllers. The system doesn’t just let you hack away at your opponent; it procedurally generates a battle, using familiar elements from the single-player dueling mode.