DISCLAIMER: Some of these may be outdated, as this dupe gets updated with more sounds. I don't feel like updating these discussions every time i update the dupe with a single new sound.

"Soundscape"
npc/crow/idle3.wav
npc/crow/idle4.wav
npc/crow/idle1.wav
npc/crow/alert1.wav
ambient/levels/canals/windchime5.wav
ambient/materials/creaking.wav
ambient/materials/metal4.wav
ambient/materials/metal5.wav
ambient/materials/metal9.wav
ambient/materials/metal_rattle4.wav
ambient/materials/metal_rattle1.wav
ambient/materials/shutter7.wav

"Soundscape"
ambient/creatures/town_zombie_call1.wav
ambient/creatures/town_scared_sob2.wav
ambient/creatures/town_scared_sob1.wav
ambient/creatures/town_scared_breathing2.wav
ambient/creatures/town_scared_breathing1.wav
ambient/creatures/town_muffled_cry1.wav
ambient/creatures/town_moan1.wav
ambient/creatures/town_child_scream1.wav
ambient/levels/prison/inside_battle_zombie1.wav
ambient/levels/prison/inside_battle_zombie2.wav
ambient/levels/prison/inside_battle_zombie3.wav
npc/headcrab/alert1.wav
npc/headcrab/idle3.wav
npc/headcrab_poison/ph_idle1.wav

"Soundscape Wind Loop"
ambient/atmosphere/town_ambience.wav