Deepest Trench

Deepest Trench

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100% achievement guide
By Aergis
First playthrough: Collect everything, die to every enemy tied to achievement and complete ending of your choosing.
Second playthrough: Speedrun the game skipping all dialogue/cutscenes and complete the other ending. (should be ~1h long)

Nice to knows: Holding space skips the cutscene/dialogue and dying resets the whole chapter.
   
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Chapters 1 - 5
Chapter 1

Self-explanatory and can be done in any chapter

Use Oxygen Station - You now can breathe


Text Evidence 1/5
After restoring the power 2 doors open and text evidence is inside the second door (from the power cable room)


Audio Evidence 1/7
After using the power drill to open a vent cover theres a audio evidence on the table near the corridor start


Chapter 2

Audio Evidence 2/7
Right at the start of the chapter on the first room on the left


Text Evidence 2/5
Also right at the start of the chapter in the far right corner room


Audio Evidence 3/7
After blowing up the floor with propane tank theres a audio evidence in the new room


Can only be done in Chapter 2 by dying to the shark that can be seen while repairing the outer part of the facility

Sharkbait...hoo ha ha - Death by the Megalodon

Chapter 3

Text Evidence 3/5
After getting access to the facility and going downstairs you can immediately see this text evidence on the table


Audio Evidence 4/7
Other side of the room from the text evidence 3


You might have seen "Nemo and Dory" while playing this chapter but to get this achievement you need to interact with "Dory" which is possible right after the computer cutscene which opens new corridor

Reunited - These 2 fish were separated, when I brought them together they swam off like they are looking for something

Chapter 4

Text Evidence 4/5
Right at the start of the chapter on the first room you can see vent cover to use power drill on and in the new room you can find text evidence on the table


Self-explanatory but after gaining the harpoon gun and other player/AI partner is holding down the lever in the same room go back to the first room and in the end of the corridor theres a blue panel behind a barricade

Sniper - Hitting the panel in one shot on chapter 4

Self-explanatory but achievable right after shooting the panel and entering open water with 3 sharks

Shark Week - Death by shark and Sharpshooter - You've killed your first shark

After you kill all 3 sharks and go near the second facility you can start to see that after the cliff theres a sunken pirate ship and inside it theres a chest with a black pearl

Black Pearl - Find the sunken pirate ship's loot, acquire the black pearl in treasure chest

Audio Evidence 5/7
Once you are inside the second facility you can grab the new audio evidence


Chapter 5

Audio Evidence 6/7
After installing purple fuse and opening the door theres a audio evidence on the new rooms table


Text Evidence 5/5
Right after you open the double verification door and kill the eel you can find the last text evidence just left of the door



Collect all Security logs - You've collected all the security logs
Chapters 6-10
Chapter 6

This chapter starts right after the explosion and you being in open water so before you go back into the facility turn around kinda opposite of it to see large open area with few sharks and lights (can avoid the sharks by following the cliff wall) and a flying saucer

Independence Day - This achievement is hidden. Find the crashed alien ship

This achievement is only available in this chapter and despite there being multiple enemies that can shock you you need to find eel to deliver the killing blow

Eel-ectric Slide - Death by eel

Now that you found yourself back to the facility you have to fight the Kraken by dropping some propaine tanks on top of it and shooting them with harpoon gun

Calamari - Defeating the Kraken

Chapter 7

Audio Evidence 7/7
After diving and power drilling the vent cover you can find the last audio evidence in the left room from the vent


Collect All Datalogs - You've collected all the datalogs

Chapter 8

After getting trapped in a room with shark and once you have restored the power you can interact with one of the test tubes that holds alien inside

Find the alien test subject

Chapter 9

Choice for two of the ending achievements

Chapter 10

All the ending achievements + platinum/completion achievement


Maria on the beach - Complete game with Maria


Rob on the beach - Complete game with Rob


Game completed x2 - Completed game with rob and maria both


Super Swimmer - Complete the game in under 2 hours


Master of the Ocean - Acquire all achievements
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