Entryway: 00:00
Secret 1: 0:53
Secret 2: 1:13
Secret 3/Secret 4: 1:25
Secret 5: 1:47

Underhalls: 2:27
Secret 1: 3:30

The Gantlet: 5:47
Secret 1: 7:31

The Focus: 9:23
Secret 1: 9:48
Secret 2: 10:34
Secret 3: 11:25

The Waste Tunnels: 12:43
Secret 1: 13:31
Secret 2: 14:52
Secret 3: 19:07

The Crusher: 19:50
Secret 1: 20:16
Secret 2: 20:52
Secret 3: 23:57

Dead Simple: 26:36
Secret 1: 29:04

Tricks and Traps: 29:26
Secret 1: 30:21
Secret 2: 31:09
Secret 3: 31:50
Secret 4: 33:48
Secret 5: 34:06
Secret 6/Secret 7: 34:35

The Pit: 36:33
Secret 1/Secret 2/Secret 3: 38:00
Secret 4/Secret 5: 39:54
Secret 6: 41:58

Refueling Base: 45:39
Secret 1/Secret 2: 48:03
Secret 3/Secret 4: 48:32
Secret 5/Secret 6/Secret 7: 49:02
Secret 8/Secret 9: 51:53
Secret 10/Secret 11: 52:12
Secret 12/Secret 13/Secret 14/Secret 15: 54:48
Secret 16/Secret 17/Secret 18: 55:55

Circle of Death: 57:52
Secret 1: 59:27
Secret 2: 1:00:45
Secret 3: 1:02:11

The Factory: 00:00
Secret 1: 1:24
Secret 2: 1:42
Secret 3: 3:35
Secret 4: 4:54

Downtown: 7:38
Secret 1: 9:25
Secret 2: 10:16
Secret 3/Secret 4: 13:11
Secret 5: 13:57
Secret 6: 14:29
Secret 7: 15:03
Secret 8: 15:39

The Inmost Dens: 18:23
No Secrets

Industrial Zone: 24:43
Secret 1: 25:20
Secret 2: 25:48
Secret 3: 27:42
Secret 4: 29:02
Secret 5: 31:33 (use idclip to get the secret)
Secret 6: 32:10
Secret 7/Secret 8/Secret 9/Secret 10: 34:14
Secret 11: 34:58

Wolfenstein: 35:24
Secret 1: 37:15
Secret 2/Secret 3/Secret 4: 41:48

Grosse: 42:29
Secret 1-Secret 6: 43:22

Suburbs: 45:56
Secret 1/Secret 2: 47:25
Secret 3/Secret 4: 48:13

Tenements: 54:30
Secret 1: 56:41
Secret 2: 1:01:11
Secret 3: 1:02:15

The Courtyard: 1:03:57
Secret 1: 1:07:59
Secret 2: 1:08:22
Secret 3: 1:08:53
Secret 4: 1:10:11

The Citadel: 1:13:13
Secret 1/Secret 2: 1:18:30
Secret 3/Secret 4/Secret 5: 1:18:55
Secret 6: 1:19:16
Secret 7: 1:20:30
Secret 8: 1:22:19
Secret 9: 1:23:47

Gotcha!: 1:25:15
Secret 1: 1:25:20
Secret 2: 1:26:12
Secret 3: 1:26:53
Secret 4/Secret 5/Secret 6: 1:27:34
Secret 7: 1:28:30

Nirvana: 00:00
No Secrets

The Catacombs: 5:41
Secret 1: 5:44
Secret 2: 5:55
Secret 3: 8:00

Barrels O' Fun: 8:53
Secret 1: 11:47
Secret 2: 12:32

The Chasm: 15:58
Secret 1: 17:37
Secret 2: 19:26
Secret 3: 20:09
Secret 4: 22:16

Bloodfalls: 28:13
Secret 1: 30:43
Secret 2: 32:08

The Abandoned Mines: 33:34
Secret 1/Secret 2: 33:40
Secret 3: 38:50
Secret 4: 39:13

Monster Condo: 41:36
Secret 1: 41:42 (be quick it's on a timer)
Secret 2: 42:03
Secret 3: 42:19
Secret 4: 45:10
Secret 5: 46:37
Secret 6: 47:14
Secret 7: 50:03
Secret 8: 50:22 (use idclip to get the secret)

The Spirit World: 51:34
Secret 1/Secret 2/Secret 3: 52:44
Secret 4/Secret 5: 55:29
Secret 6: 57:40
Secret 7: 58:11

The Living End: 1:00:03
No Secrets

Icon Of Sin: 1:08:37
No Secrets