Speedrun event icon@2x

Speed Run is a mode. As the name implies, the player must eradicate the entire human population in as few days as possible. It is located below the new game button, the + sign shows the player four game modes, with Speed Run Mode located to the right of the most recent game mode, Scenarios

On the Game Center on Apple products, there is a leaderboard for the fewest days wiped out. 

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