Hi basically I have the same question like maxrpg in this Topic.
Only that it doesn't work for me. And the difference maybe, that I have an Enemy-Family
So if there are 2 enemies overlapping each other the Bullet Sprite will subtract HP from both of the Enemies on collusion instead of only on. For example the one on top.
Develop games in your browser. Powerful, performant & highly capable.
I asked the same question years ago. Sry for that. The solution is here.
It works by overlapping but not by collusion. Why?
Bullet on collision with Enemy Enemy pick top instance Enemy subtract 1 from HP Bullet destroy
If you don't want to destroy the bullet, you can disable collisions for it.
If this doesn't work, please post your project of events screenshot.