Drown in Yesterday's Sea: All 8 Clue Locations

locations By GuideLVL Published August 29, 2026

Drown in Yesterday’s Sea has eight hidden clue items to find, a diving gear shop that wants a six digit code, and a Sea Spirit who asks four questions from a pool of twenty. The eight locations, the door code and all twenty answers are below, then the window size keys, the language setting and a crash worth knowing about.

Here is the whole set of clues, in the order the game gives them to you.

#	Clue	Chapter	Area
1	Letter	1	Xiamen University Siming Campus, outside
2	Notice	1	Baicheng Beach
3	Potion	2	Jimei School Village, park entrance
4	Locator	2	Baicheng Beach
5	Map	3	Huangcuo Beach 1
6	Contract	3	Gulangyu, Gusheng Cave Boardwalk
7	ID Card	3	Zhongshan Road Pedestrian Street
8	Tape	4	Hospital Ward, bathroom

Nothing below touches the story. It is locations and answers only, so the most it gives away is which chapter each clue turns up in and which parts of the city you pass through on the way.

A few of the eight are sneaky, so each one gets its own section below with the exact place to stand.

Clue 1: The Letter

The Letter is outside the Xiamen University Siming Campus rather than anywhere inside it. Follow the pavement that runs along the front of the red campus building, on the far side of the iron railings and the hedge. The marker sits down at street level, beside a parked car.

The Letter marked at street level outside Xiamen University Siming Campus, beside the parked car under the red building

Clue 2: The Notice

The Notice is on Baicheng Beach. Head away from the water, down towards the bottom-left of the screen. Two palm trees stand down that side, and the one you want is the small one right in the corner, not the taller one above it. The marker sits on that palm’s own fronds, with the Notice tucked in under the leaves against the trunk.

On Baicheng Beach the big red diamond is a zoomed inset, not the spot. The arrow out of it points down to the small outline sitting on the leaves of the corner palm, where the character is already standing

Clue 3: The Potion

The Potion is at the Jimei School Village park entrance. Cross to the pavement in front of the long ornamental gateway, the side of the road away from the waterfront railings. The marker is out on the paving beside the street lamp.

The Potion marker sits well to the right of the parked white car, on the strip of pavement between the road and the wall. Everything below the road, the trees, the benches and the harbour railings, is the wrong side

Clue 4: The Locator

The Locator sends you back to Baicheng Beach, but not to the same spot as before. The difference is sideways rather than further down the sand. Go to the taller palm standing near the bottom middle of the screen, well to the right of the one in the corner. The marker sits on its fronds. The bright yellow-green patch of grass right beside that palm is not the spot.

The same stretch of Baicheng Beach again, with the inset arrow pointing down and to the right this time. It lands on the palm at the bottom middle of the screen, not the corner palm at the left edge that held the Notice

Clue 5: The Map

The Map is on Huangcuo Beach 1. Make for the red lighthouse standing on its own little headland. The marker is out on the open sand a short way to the right of the lighthouse, below the two rowing boats sitting offshore.

No landmark sits on the Map's spot, so go by what is around it. The blue starfish lies just below and to the left of the marker, and the rocks sitting in the shallows are further right again

Clue 6: The Contract

The Contract is on the Gusheng Cave boardwalk at Gulangyu. Get onto the railed stone boardwalk and walk it to its right-hand end, past the cave mouth set into the rock face above you. The marker is waiting at the far end of the walkway.

The Contract's marker sits right at the edge of the screen, past both of the figures walking the boardwalk. The cave mouth behind them is a dark opening in the grey rock with two standing stones inside it

Clue 7: The ID Card

The ID Card is on Zhongshan Road Pedestrian Street, and it is not inside any of the shops. Stay out on the tiled street under the red lanterns and go to the leftmost of the big banyan trees in their round planters. The marker is at its base.

Three banyan trees stand in round planters along Zhongshan Road Pedestrian Street. The ID Card is at the first of them, half off the left edge of the screen, not at the middle tree or the flower bed further along

Clue 8: The Tape

The Tape is in the bathroom off the hospital ward rather than in the ward itself. Go through, and the marker is on the tiled floor between the toilet and the bathtub.

The Tape's marker is one step above the character as she comes in, tight against the foot of the blue bath. The wooden cabinet and the towel rail are at the top of the room

Diving Gear Shop Door Code

Trying the door of the diving gear shop tells you it has a combination lock on it. The code is 750630.

The diving gear shop is the long hut at the top right of the beach, with yellow ribbed walls, three barred windows and a blue signboard in Chinese along the top. The door is the dark opening at its left end, beside the blue noticeboard

Sea Spirit’s Quiz Answers

The Sea Spirit asks four questions. Each of the four is drawn at random from a pool of five, so any single run shows you only four of the twenty below. A few of them lean on Chinese general knowledge. Common sense usually gets you the answer anyway. Where it does not, the option that stands out from the other three is usually the right one.

The first question is one of these five.

Question	Answer
What kind of plant is the banana, botanically?	A herb
Which mineral pigments held the blue and green in Wang Ximeng’s A Thousand Li of Rivers and Mountains for a thousand years?	Malachite and azurite
Where is the driest desert on Earth outside the polar regions?	The Atacama Desert, in South America
Which of Shakespeare’s four great tragedies has an ordinary general as its lead instead of a royal?	Othello
Cutting an onion releases a gas. What does it form when it reaches your eyes?	Sulfuric acid

The second question is one of these five.

Question	Answer
You are in a race and you have just passed the runner who was second. Where are you now?	Second place, because you inherit the position of whoever you pass
In Greek myth, who answered the Sphinx’s riddle correctly and shamed it into killing itself?	Oedipus
Which Japanese dish is traditionally slurped to thank the cook and show the food is good?	Ramen
What can be left behind after a massive star goes supernova?	A neutron star or a black hole
Which novel is the word Shangri-La from?	Lost Horizon

The third question is one of these five.

Question	Answer
Which bone in the human skeleton is the longest and hardest?	The femur, the thigh bone
Which element is second most common in the Earth’s crust?	Silicon, which comes after oxygen
Apples, pears and peaches all belong to which plant family?	Rosaceae
What is a Potemkin village?	A staged front put up to fool whoever is looking at it
Which of the listed birds cannot fly?	The ostrich

The fourth question is one of these five.

Question	Answer
Which of the options is not one of China’s Four Famous Embroideries?	Beijing embroidery
Which continent is the smallest?	Oceania
Which is the earliest anthology of Chinese poetry?	The Book of Songs
Which of the animals listed is not cold-blooded?	The penguin
Which tradition gave us ksana, the smallest possible unit of time?	Buddhism

Questions That Differ in the Chinese Version

Two slots in that pool are not the same in every language. In English, the second question can be the supernova one and the third can be the Potemkin village one. Play in Chinese and each of those two slots holds a different question instead.

Slot	Question	Answer
Second question	Which line follows “Tonight the moon is bright and everyone gazes at it”?	The line about who will find these autumn thoughts
Third question	The idiom 勾心斗角, gouxin-doujiao, now describes scheming and setting traps against one another. What did it originally refer to?	Architectural design

All four options appear on screen in Chinese, so match them by sense rather than word for word.

Window Size and Fullscreen

Alt and Enter together toggle fullscreen. In windowed mode, F5, F6 and F7 set the window size, although at the time of writing that only works in the English version.

Key	Window size
F5	1x
F6	2x
F7	3x

Pressing the same key a second time switches the scaling between HQX and nearest neighbour, so you can pick between a smoothed picture and hard pixel edges.

The game’s own resize is better suited to pixel art than Windows scaling is. So on a high-DPI display, turn Windows scaling off for the game. Open the properties for Game.exe, go into the high DPI settings, set scaling to be performed by the application, then size the window with those keys.

Crashes When Minimised

At the time of writing the game can crash in rare cases when it is minimised or left running in the background. Save more often than you otherwise would.

How to Change the Language

Right-click the game in your Steam library, open Properties, and change the Language setting on the General tab.