Baphomet's Demesne: 00:00
Secret 1/Secret 2: 0:36
Secret 3/Secret 4: 1:19

Sheol: 3:04
Secret 1/Secret 2: 3:16
Secret 3: 3:40
Secret 4: 4:13

Cages Of The Damned: 6:30
Secret 1/Secret 2: 8:40
Secret 3: 9:52
Secret 4: 11:17

Paths Of Wretchedness: 11:50
Secret 1: 12:39
Secret 2: 13:57
Secret 3: 14:39
Secret 4: 15:22
Secret 5: 19:16

Abaddon's Void: 21:04
Secret 1: 21:23
Secret 2: 21:56
Secret 3: 23:15

Unspeakable Persecution: 29:24
Secret 1: 29:59
Secret 2: 30:31
Secret 3: 31:18
Secret Level Entrance: 33:57

Realm Of Iblis: 35:11
Secret 1: 36:53
Secret 2: 37:47
Secret 3: 39:43
Secret 4: 40:19

Nightmare Underworld: 41:59
Secret 1/Secret 2: 42:03
Secret 3: 43:39
Secret 4/Secret 5: 44:31
Secret 6: 45:10 [activate the trigger to move the wall then wait like 10 seconds before going back]

Halls Of Perdition: 54:22
Secret 1/Secret 2: 58:31
Secret 3: 58:59
Secret 4: 1:00:22