A very simple modded file to get rid of the zombie and horde blips for immersion purposes. I have done a workaround to avoid using any scripts, so this will not affect the save game in any way.

The idea is to listen to the environment and to actually resort to the survey points to spot things, including your own scavengers roaming around.

This is the link to the original thread. https://forums.undeadlabs.com/threads/mod-no-zombie-radar-blips.36629/. I've just got back to the game after purchasing Lifeline, so I don't know how much has changed. There is no scripting, so it should be compatible with any mod that doesn't alter the icons_map file. For Breakdown, you can't see the blips in any levels.

Installation:
Unzip into your main SOD folder
Uninstall:
Delete icons_map from the GameTexturesGuiMap folder.

Recommended mods:

Adeno's George Romero Mod;
Any mod that removes zeds glowing eyes.