Still Wakes the Deep

At the start of the game, get outside of your room and have a chat with Finlay, working on the ladder. After this conversation head left inside the shower room and simply stand behind the person having a bath for a few seconds for this achievement.

00:05:00 - "McLeery" Achievement

Extended Timestamps:
00:00:00 - Intro & Settings
00:01:45 - Accommodation
00:03:15 - Light switch (Electrical Appliance)
00:03:25 - 03 Cabins (missable)
00:05:00 - "McLeery" Achievement
00:05:35 - 02 Cabins (missable)
00:06:20 - TV in Crew Lounge (Electrical Appliance)
00:07:05 - 04 Conversations with crew members (Canteen)
00:09:15 - "All Beans and Forgiveness" Achievement

00:11:35 - Deck & Under Rig
00:12:05 - 04 Conversations with crew members (Deck)
00:15:10 - "Social Butterfly" Achievement
00:21:45 - "The Sickening of the Calm" Achievement
00:22:00 - 01/05 Sea Dive Death / 01 Death (Falling into Sea)
00:22:30 - Heater (Electrical Appliance)
00:27:55 - 02 Death (Falling from Balance Beam)
00:28:45 - 03 Death(Fire)

00:31:35 - LEG C
00:32:35 - 04 Death (Fall to Death)
00:36:55 - 05 Death (Steam)
00:41:45 - 01/19 Crew Member Body
00:43:05 - "Breathe In, Breathe Out, Repeat" Achievement

00:43:10 - Accommodation (Second Visit)
00:43:20 - Heater (Electric Appliance)
00:44:00 - 01 Phone-Call
00:48:30 - 01/07 Electrical Hazard Death / 06 Death (Electricity)
00:49:20 - 07 Death (Monster Veins/Blob)
00:51:30 - "Sailing By" Achievement

00:53:25 - Lifeboat Access (Port Side)
00:53:40 - 02/05 Sea Dive Death
00:56:00 - "Home by Christmas" Achievement
00:56:55 - 02 Phone-Call
00:58:25 - "Fahrenheit 0451" Achievement
00:59:00 - 03 Phone-Call

00:59:55 - Utility
01:02:15 - "Leaning Into It" Achievement
01:02:25 - "General Strike" Achievement
01:02:40 - 08 Death (Death by Monster - Trots)
01:05:20 - "Eye of the Needle" Achievement

01:06:00 - Deck (Second Visit)
01:07:05 - "Jetsam" Achievement
01:08:00 - 02/07 Electrical Hazard Death
01:10:00 - 02/19 Crew Member Body
01:11:47 - 03/19 Crew Member Body
01:12:35 - 04/19 Crew Member Body (not interactable)
01:12:45 - 09 Death (Death by Monster - Muir)
01:14:25 - 05/19 Crew Member Body
01:18:20 - 03/07 Electrical Hazard Death
01:21:40 - "Everything Breaks" Achievement
01:21:50 - 03/05 Sea Dive Death
01:22:45 - 04 Phone-Call
01:24:05 - 05 Phone-Call

01:25:00 - Administration
01:25:15 - 06 Phone-Call
01:27:15 - 04/07 Electrical Hazard Death
01:28:25 - 10 Death (Death by Monster - Rennick)
01:29:45 - 05/07 Electrical Hazard Death
01:30:55 - "I Am The King" Achievement

01:31:00 - Starboard Side
01:31:15 - 04/05 Sea Dive Death
01:32:55 - 07 Phone-Call
01:34:40 - 06/07 Electrical Hazard Death
01:35:35 - 11 Death (Gas)

01:37:25 - Engineering (First Visit)
01:46:40 - "Look At All This Mess!" Achievement
01:49:10 - 12 Death (Death by Monster - Addair)
01:53:10 - "Compression Ignition" Achievement
01:58:55 - "Into the Belly of the Beast" Achievement
01:58:10 - 08 Phone-Call

02:01:15 - LEG A & LEG B
02:02:05 - 13 Death (Fall while crossing pipeline)
02:03:50 - 06/19 Crew Member Body
02:08:55 - "Greased Scotsman" Achievement
02:09:10 - 07/19 Crew Member Body (he is in your way, no need to interact. Caz will make a remark after getting out of water)
02:09:30 - "Cerebral Anoxia" Achievement
02:12:25 - 08/19 Crew Member Body
02:13:40 - 09/19 Crew Member Body
02:19:10 - 10/19 Crew Member Body
02:19:40 - 14 Death (Death by Monster - O'Connor)
02:19:55 - "Finlay Destination" Achievement
02:23:20 - "Surfacing" Achievement

02:23:40 - Processing Quad (Accommodation)
02:24:00 - Heater (Electrical Appliance)
02:24:20 - 09 Phone-Call
02:26:20 - 10 Phone-Call
02:36:05 - "Beacon in the Dark" Achievement
02:36:30 - 05/05 Sea Dive Death
02:36:35 - "Full Fathom Five" Achievement

02:41:25 - Engineering (Second Visit)
02:47:10 - 07/07 Electrical Hazard Death
02:47:20 - "Not so Good with the 'Leccy" Achievement

02:51:25 - Accommodation (Third Visit)
02:51:30 - "Treading Water" Achievement
02:51:40 - Heater (Electrical Appliance)
02:52:05 - 11 Phone-Call
02:54:10 - 11/19 Crew Member Body (Automatic, unmissable)
02:54:30 - 12/19 Crew Member Body (Automatic, unmissable)
02:55:25 - 13/19 Crew Member Body
02:55:55 - 14/19 Crew Member Body (two bodies, count as one)
02:56:40 - 15/19 Crew Member Body (Automatic, unmissable)
02:57:20 - 16/19 Crew Member Body
02:57:40 - "Snoop" Achievement
02:57:50 - "Me and My Spoon" Achievement

02:58:45 - Roof and Marine Control
02:58:50 - "Beaufort Eleven" Achievement
03:01:00 - 12 Phone-Call
03:06:00 - 17/19 Crew Member Body
03:09:25 - "Good with the 'Leccy" Achievement
03:10:00 - "Leviathan" Achievement
03:14:05 - 13 Phone-Call
03:14:20 - "Clear Down" Achievement
03:16:30 - "The Drowning of Davey Rennick" Achievement
03:16:35 - 18/19 Crew Member Body (Unmissable, Probably Rennick's)

03:17:35 - Drill Ops
03:23:05 - 19/19 Crew Member Body (Unmissable, Finlay's)
03:25:10 - "Body Count" Achievement

03:25:35 - Derrick
03:25:40 - "The Horror Sings" Achievement

03:27:15 - Epilogue

After Credits:
03:31:30 - "Still Wakes The Deep" Achievement
03:31:40 - "Walking Simulator" Achievement
03:31:50 - "Bheir an cuan a chuid fhèin a-mach" Achievement

03:31:55 - Subscribe!

This is probably the first achievement when starting the game. When you leave your room you’ll walk down the hallway & speak to a woman on a ladder. The room directly to your left is a shower room. A man is taking a shower stand behind him for about 3-5 minutes & the cheevo will pop.