First Steps: 00:00
No Secrets

The Chambers: 1:31
Secret 1: 1:55
Secret 2: 2:26
Secret 3: 3:28

The Chambers of Agony: 4:08
Secret 1: 4:21
Secret 2: 5:26
Secret 3: 7:32

Sewers Level 1: 8:38
Secret 1: 9:08

Sewers Level 2: 9:54
Secret 1: 11:00
Secret 2: 12:19

The Gates: 14:12
Secret 1: 14:17

The Deadlands: 15:47
Secret 1: 16:14

Shi No Uchi: 17:18
Secret 1: 17:32

Entrance: 21:02
Secret 1/Secret 2: 21:54

The Courtyard: 23:06
Secret 1: 24:06
Secret 2: 24:25

The Keep: 24:58
Secret 1: 25:50

The Battlements: 27:38
No Secrets

The Sorcerer: 30:15
No Secrets

Ellesmere: 00:00
Secret 1: 0:47

Fjord: 2:37
Secret 1: 4:16

The Descent: 5:15
Secret 1: 5:19
Secret 2/Secret 3: 5:40
Secret 4: 5:56

Trapped: 6:39
Secret 1: 6:50
Secret 2/Secret 3: 7:04
Secret 4: 7:54

Base Insertion: 8:42
Secret 1/Secret 2: 8:45
Secret 3/Secret 4: 9:10
Secret 5: 9:45

Dead Halls: 10:09
Secret 1: 10:11
Secret 2: 10:16
Secret 3/Secret 4: 10:43
Secret 5/Secret 6: 11:38

The High Ground: 12:05
Secret 1/Secret 2: 12:30
Secret 3: 12:51
Secret 4: 13:02

Alpha Labs: 14:18
Secret 1: 14:21
Secret 2: 14:32
Secret 3: 15:20

Outpost 31: 15:51
Secret 1/Secret 2/Secret 3: 15:55

Delta Labs: 17:47
Secret 1: 17:50
Secret 2: 18:18
Secret 3: 18:32

Antarctic Anomaly: 19:46
Secret 1: 19:53
Secret 2/Secret 3: 20:01
Secret 4/Secret 5: 20:25
Secret 6: 21:21
Secret 7/Secret 8/Secret 9: 22:27

The Great Old One: 23:59
No Secrets

Atsui: 00:00
Secret 1/Secret 2: 0:52
Secret 3/Secret 4/Secret 5/Secret 6/Secret 7: 1:06

Sahara: 2:50
Secret 1: 3:01
Secret 2: 3:21
Secret 3: 4:12

Giza: 5:44
Secret 1: 6:21
Secret 2: 6:31
Secret 3: 6:55

Burial Chambers: 8:59
Secret 1/Secret 2: 9:03
Secret 3/Secret 4: 9:20
Secret 5: 9:39
Secret 6/Secret 7/Secret 8: 11:13

Gateway: 13:06
Secret 1/Secret 2: 13:13
Secret 3: 13:37
Secret 4/Secret 5: 13:50
Secret 6: 14:24
Secret 7: 14:34
Secret 8: 14:48

Inner Grounds: 15:37
Secret 1/Secret 2: 16:24
Secret 3: 17:30
Secret 4: 18:46
Secret 5/Secret 6/Secret 7: 19:01

Anubis's Domain: 19:40
Secret 1: 19:44
Secret 2: 20:15
Secret 3: 21:32

Ancient Secrets: 23:33
Secret 1: 23:39
Secret 2/Secret 3/Secret 4: 23:55
Secret 5: 24:32
Secret 6: 25:17

The Valley of the Graves: 26:55
Secret 1/Secret 2/Secret 3: 27:03
Secret 4: 27:47
Secret 5/Secret 6: 28:16

The Trails of Despair: 30:43
Secret 1: 30:47
Secret 2: 31:05
Secret 3/Secret 4: 31:27
Secret 5: 32:01

The Path of the Grave Robber: 33:50
Secret 1: 33:54
Secret 2: 36:49
Secret 3: 38:06
Secret 4: 38:25

The Sphinx: 40:15
No Secrets

Silent Streets: 00:00
Secret 1: 0:58
Secret 2: 1:12
Secret 3: 2:58

The Prefecture of Pain: 3:28
Secret 1: 4:12
Secret 2: 4:47
Secret 3: 5:19

Masochistic Metropolis: 7:16
Secret 1: 7:28
Secret 2: 7:48
Secret 3: 8:22
Secret 4/Secret 5: 8:46

The Skyscraper: 10:56
Secret 1/Secret 2/Secret 3: 11:04
Secret 4: 12:31

Loading Bay: 14:43
Secret 1: 14:46

Shipyards: 16:44
Secret 1: 16:55

Processing: 18:22
Secret 1: 18:25
Secret 2/Secret 3: 19:37

Hangar: 21:32
Secret 1: 21:42
Secret 2: 22:05

Command Center: 24:26
Secret 1: 25:09

Communications: 26:40
Secret 1: 26:51
Secret 2: 27:04

The Armory: 29:38
Secret 1: 29:42
Secret 2/Secret 3: 30:16
Secret 4: 30:35

Tank: 32:35
No Secrets

Smash the Gates: 00:00
Secret 1/Secret 2: 1:13

The Battleground: 2:21
Secret 1: 2:40
Secret 2: 2:58
Secret 3: 3:11
Secret 4: 4:19

Hell Hath Frozen Over: 5:53
Secret 1/Secret 2: 6:15
Secret 3: 7:08
Secret 4: 7:24
Secret 5: 8:51

Dagon Post: 9:11
Secret 1/Secret 2: 11:00

Lake Vesuvius: 13:07
Secret 1/Secret 2/Secret 3/Secret 4: 14:12
Secret 5/Secret 6/Secret 7: 14:55
Secret 8/Secret 9: 15:19

The Outpost: 17:02
Secret 1: 17:51
Secret 2: 18:13
Secret 3/Secret 4: 18:35

Sahara: 20:16
Secret 1: 20:37
Secret 2: 22:59

The Black Tomb: 24:12
Secret 1: 24:41
Secret 2: 26:07

The Gauntlet: 27:14
Secret 1: 27:20
Secret 2: 27:40
Secret 3: 29:45
Secret 4: 30:04

The Maelstrom: 31:01
Secret 1: 31:39
Secret 2/Secret 3: 32:42
Secret 4: 34:11

The Lord of Hell: 37:41
No Secrets