How do I create "opponent's sight"

Trying to do something on the principle of cameras scanning the area from right to left in platformer game. If the player enters the camera light the end of the game. it's about something like that presented on the masterpieces below

I am asking for help and indicating the way I should follow to do this

Have you tried "Line of sight"?

In C2 select New Project and search for "Line of sight" in the list of templates.

KillCam?

dop2000i can't find line of sight in template list :( FacuLNF If killcam means cameras that check a certain area and end of the game if the player enters his light, yes.

I am asking for some advice because I have no idea how to go about it :(

You don't have this template?!

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You can also search this forum or Tutorials section for LOS tutorials, there should be plenty of them.