Mystery heroes, with the following changes:
- One hero from each team is swapped roghly every 10 seconds
- Players retain momentum, health percent and, optionally, ult charge between swaps
The game also has the following playability features:
- Players are given a 10 second warning before their hero swaps
- Players are locked out of their last three heroes
- Players who havn't swapped in the longest time are more likely to swap next
- Hero-swap is delayed if the player is using their ultimate, for a minimum of 3 seconds
- Hero selection is balanced between each role, making teams more likely to be fair
- The game avoids duplicate heroes for the same reason
- Teams have, optionally, a minimum of one healer
