In Mystery Duel, each team is made of only one player. There is no objective in Mystery Duel; the only goal is to kill the enemy player.
Each round, both players will be randomly assigned a hero (excluding Lúcio, Mercy, symmetra, brigitte, zarya, winston, reinhart, d.va, torbjörn and bastion). The hero will be displayed at the beginning of the round in the victory pose either player has equipped.
If one player kills the other, that player receives a point and the next round begins. The game will continue until one player earns 5 points, winning the game.
After 2 minutes without either player dying an area will be marked. After another 30 seconds without a death, the area becomes a capture point, and the win will be awarded to whichever player captures it.
The maps available in Mystery Duel are Black Forest, Castillo, Ecopoint: Antarctica, and Necropolis. In Game Browser, the Elimination map list, which is also used for the Mystery Duel rule set, also includes the redesigned Control sub-maps.
- If either player leaves the game, the other player will automatically win.
- The quitter will also forfeit their Play of the Game; the Play of the Game of that match will show the Highlight from the other player instead, even if in that Highlight the other player did nothing or was dying.