
Mystery Heroes is an Arcade game mode. It used to be a brawl but was upgraded to a full game mode due to its popularity.
Details[]
In Mystery Heroes, players cannot select their own hero.
- The "Assemble Your Team" section is skipped upon starting a game.
- Players will be assigned a random hero upon entering a game and every time they respawn, with their ultimate meter being reset. A player cannot respawn as the same hero they were when they died.
- An exception to this is when a player kills themselves. They will respawn as the same hero, but any buildable objects on the map will disappear and their ultimate meter will still be reset.
- Because of the randomly-assigned hero mechanic, hero stacking is allowed.
Otherwise, Mystery Heroes matches play identically to standard Quick Play matches; it means other rules and objectives of the game follows the map in play.
Winter Mystery[]

During the Winter Wonderland seasonal event in 2016, Mystery Heroes was changed to Winter Mystery. It played identically to standard Mystery Heroes, but the only maps available were King's Row (Winter) and Hanamura (Winter).
Patch changes[]
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