For a while I've been trying to figure out a way in Construct 3 for Asteroid Destroyer when player 1's health reaches 0 every sprite attached to the spaceship including the spaceship gets destroyed, but player 2 can continue playing until they die and it takes them to the game over screen. And the same thing for when player 2 dies first and player 1 can continue playing.
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The sprites you assembled on the spaceship will have the spaceship ID.
If spaceship's HP = 0, you will pick all sprites which = spaceship ID and destroy it.