Main Levels
- Level 0 - Constant Hum-Buzz
- Level 1 - Low Hum-Buzz Rumbling of Machinery
- Level 2 - Quiet Rumbling of Machinery
- Level 3 - Loud Rumbling of Machinery
- Level 4 - Office Ambient Quiet Hum-Buzz
- Level 5 - Relaxing Piano Music; Scary Music in dangerous areas; Quiet Hum-Buzz; Boiler Room is the same as Level 3
- Level 6 - Loud Distant Screaming
- Level 7 - Water Sounds
- Level 8 - Water Leaks
- Level 9 - Nighttime Ambience
- Level 10 - Wind Noises
- Level 11 - Big City Ambience
- Level 12 - None
- Level 13 - Quiet Hum-Buzz
- Level 14 (Hospital) - Same as Level 9
- Level 14 (Paradise) - Relaxing Music
- Level 15 - Loud Rumbling of Machinery
- Level 16 (Hospital) - Same as Level 14 (Hospital) and Constant Annoucements about Entity 19
- Level 17 - Water Sounds
- Level 18 - Same as Level 13 but with Children Laughing
- Level 19 - Same as Level 13 but with Screeching
- Level 20 - Wind Noises
- Level 21 - Quiet Hum-Buzz
- Level 22 - None
- Level 23 (Factory) - Factory Ambience
- Level 23 (Garden) - Bird Sounds
- Level 24 - None
- Level 25 - Arcade Ambience
- Level 26 - Quiet Hum-Buzz
- Level 27 - Same as Level 13 but with Screeching
- Level 28 - Same as Level 13 but with Screeching
- Level 29 - Level Ambience From Paintings
- Level 30 - Piano Sounds