Set up the game as if you were playing with 2 players (6 daikaiju), and never have less than 3 on the board, unless of course there’s less than 3 remaining.
Your goal is to survive longer than the monsters! Once a daikaiju is eliminated (goes off the board or is taken over by a different daikaiju) it is removed from play. You must make it through all 10 daikaiju to win!