How do I kill one enemy without killing them all at once?

So I'm making a zombie survival game with different waves that come at you. But I encountered a weird problem that I don't know how to fix. See, the zombies are spawned from an object offscreen so that they can come at you forever. But when I kill one zombie with my weapon, they ALL die at once. Is there any way to fix this?

This is probably due to the object being unreferenced in the event.

See here:

construct.net/en/make-games/manuals/construct-3/project-primitives/events/how-events-work

A screenshot of your code would be useful to understand why this would be happening though.

This is a screenshot of the code that takes away damage when I hit a zombie and then when its health is at 0. tell me if i did anything wrong.

You should use an instance variable on the zombie object itself rather than a global variable.

Thanks, it works properly now.