no hud survival mode

https://foxtrot-wiki.win/index.php/A_Complete_Left_Behind_DLC_Playthrough_Guide:_Key_Choices_and_Tactical_Tips

No hud survival mode strips away all the on-screen indicators, leaving you to navigate the wilderness with nothing but your instincts. You'll have to listen for enemy footsteps, feel the temperature change for weather shifts, and rely on visual cues to track resources. It's a tense, immersive way to play where every decision matters because you can't just glance at a minimap or health bar. Just you and the harsh environment.