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.
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.