Call of Cthulhu: Dark Corners of the Earth: Getting 100% and Rank A

There are conflicting descriptions of what to do on the internet. So I checked everything myself. After reading this guide, there will be no misunderstandings. You will get what you want simply and easily. Everything has been tested on the Hardened Detective and Mythos Master difficulty levels.

Finishing the game at rank A will give you an extended ending.
But how do you get this rank? It’s simple:

• Get 100% completion in the statistics
• Complete the game in less than 4 hours on the game timer.
• Make no more than 30 saves

There are no other conditions in the game and no bonuses for 5 or less saves. Also, the 3.5 hour timer has not been confirmed. The extended ending will not be shown at 100% on rank B.

Tips:
Play the game a second time. If you don’t remember what to do in the game, it will be very hard to keep up with the timing.
Skip the cutscenes, they count against the timer.
Let’s give you some time references: Rescue Ruth within 50 minutes and get on the Urania within 1 hour and 40 minutes. In the end, we’ll pass with a good margin in 2 hours and 30 minutes.
If you feel you’ve wasted a lot of time, load up.

Your progress percentage is displayed in the game statistics. You can check it at any time. Note that the percentage updates at different rates, with some actions affecting you immediately and others only at the end of the chapter. If the percentage has not changed before and after picking up the item, this is normal.

And once again, I’d like to remind you that completing 100% of the game does not guarantee that you’ll get Rank A. However, completing 100% is mandatory to get Rank A!

Let’s go straight to complete all the tasks and collecting all the items.
I have arranged everything in the order of completing the game. So, here we go.

Item: Podium Sermon.
Chapter: Prologue.
Location: Cultist House, 1F.
How to find it: Enter the house and the first door on the right will lead you to a room with a long table. The sheet we need is on the pulpit.

Item: Diary of a Cult Member.
Chapter: Prologue.
Location: Cultist House, 2F.
How to find it: On the second floor opposite the room with the gunman there is a door, go in and take the diary on the edge of the second table.

Item: Pnakotica.
Chapter: Prologue.
Location: Cultist House, 1F.
How to find it: After taking the key in the room with Jack Walters’ photos, unlock the door by the Sign save point. In this room, in addition to the mirror and the trapdoor, there is a desk on the right side of the wall. The item we need is in the bottom drawer.

Item: Diary of Brian Burnham.
Chapter: A Visit to the Old City.
Location: The basement of the shop.
How to find it: After dropping through the hatch in the floor into the basement with the stepladder, go right to the wall with the barrels. The diary is on the board.

Item: Innsmouth Courier.
Chapter: A Visit to the Old City.
Location: Photo Lab.
How to find it: Break through the wall in the basement and go up to the room with the red light. On the floor on the left are some boards hiding our item. Note that the newspaper has to be picked up, the first time the action button is pressed it only starts the animation and the Jack’s commentary.

Item: Diary of Thomas Waite.
Chapter: A Visit to the Old City.
Location: Thomas Waite’s house.
How to find it: Go into the room where the creature escaped from in the attic, killing Ramona and knocking the Jack out. On the left on the crate with the candles is a diary.

Item: Ramona Waite’s Coloring Book.
Chapter: A Visit to the Old City.
Location: Thomas Waite’s house.
How to find it: After the cutscene where the Constables take away Thomas, turn right and pick up the drawings on the floor.

Item: Book of Dagon.
Chapter: A Visit to the Old City.
Location: Thomas Waite’s shop.
How to find it: After talking to Ruth in Waite’s shop, open the safe with the combination 2612 and take the book from inside.

Item: Post Mortem Records.
Chapter: Visit to the Old City.
Location: The Gilman Hotel.
How to find it: After meeting with Gilman, grab the key from the hotel reception and go to the back office. In the back room with the dismembered corpse you will find a book on the table.

Item: Diary of the Church Minister.
Chapter: Attack of the fishmen.
Location: Rebecca Lawrence’s house.
How to find it: In Rebecca’s house, before you approach her and start the shooting scene, go
upstairs, the stairs are at the exit of the house. At the floor go through the door on the right, in the small room is the diary on the bed.

Item: Registry of Births, Deaths and marriages.
Chapter: Attack of the fishmen.
Location: The crypt beneath the church.
How to find it: In the middle of the crypt is a coffin shaped table on which is the book we need. Beneath it is a plaque, if you place a postcard on it you can see the cipher 3157 for the vault.

Item: Ship Logs of Captain Obed Marsh.
Chapter: Jailbreak.
Location: Prison.
How to find it: After taking the keys on the second floor, open the first cell. On the floor is the item we need, reading it tells us the combination to the safe in the next room is 1846.

Item: Oaths of Dagon.
Chapter: Jailbreak.
Location: Prison.
How to find it: The sheet is in Henry’s cell. To open it, bring him a dead rat from the sewers. It can be accessed with a crowbar, which can be found at the entrance to the prison.

Chapter: Escape from Innsmouth.
Location: Old cannery warehouse.
How to do it: After taking the keys and talking to Ruth, go to the crates and crawl back to where you came from. Go up into the room, break the window and jump onto the roof to the savepoint. Use the key to open the only door on the roof and continue. Climb up the ladder, jump onto the beams and reach Ruth. Knock the lock off the door, go down, jump out the window and go to the car.

Alternative Method: After taking the keys and talking to Ruth, jump onto the crates nearby and shoot at the lock. If you hit it, Jack will comment on it. Go to the exit, run into the alley on the left so that the trigger goes off and you can end the chapter.

Item: The rifle.
Chapter: The Marsh Refinery.
Location: The entrance to the refinery.
How to find it: After killing the machine gunner, Edgar Hoover tells Agent Scott Nelson to break down the door. Enter this room and pick up the shotgun, then proceed to the next room. You will find a hidden rifle when you turn around and close the door.

Item: Letter from Sebastian Marsh.
Chapter: The Marsh Refinery.
Location: Marsh’s office.
How to find it: In the middle of chasing Jacob Marsh, go into the elevator control room and power it up. There is another door in the room that leads to Marsh’s office. On the other side of the room on the desk is the letter you need.

Item: Diary of Robert Marsh.
Chapter: The Esoteric Order of Dagon.
Location: The Order’s mansion, 2nd floor.
How to find it: Go up to the second floor and enter the only open door. In front of the stained glass window of Dagon, which can be broken, is a diary on a chair.

Item: I’a Dagon and Ponape Scripture.
Chapter: The Esoteric Order of Dagon.
Location: The Order’s mansion, 1st floor.
How to find it: Pick up the diary on the second floor, which contains the combination to the safe. Go down the central stairs to the first floor and jump over the rack. Enter the room with the safe. Open the safe with the code 1878 and take the loot.

Chapter: A Dangerous Voyage.
Location: The Cutter Urania, Deck.
How to complete: At the very beginning of the chapter, after talking to Sailor Gene Henson. We protect the cutter from an attack of monsters. This mission starts from the moment we pick up the rifle until the monsters retreat for a while. Besides us and Henson, there are 3 sailors running around on the deck. As soon as one of them dies, he will spawn inside the cutter and run back to the deck. Our job is to keep a large number of these sailors from dying.

Honestly, while testing this condition, I realized that not completing was harder than completing. I deliberately let the sailors die 15 times and then completed the mission. And indeed, the completion rate was lower than it should have been. It’s hard to say exactly how many sailor deaths should be avoided, and in general it doesn’t matter. While we are running for ammunition and a first aid kit for Henson, it is not possible to control the deck.

Here is a reference point that will help you when passing clearly understand whether you have successfully completed this task or not. Before the attack, 75% complete, after the attack, 78% complete. If the percentage is lower, you have failed.

Item: Diary of one of the crew.
Chapter: Dangerous Voyage.
Location: The Cutter Urania, sailor’s quarters.
How to find it: During the mission of escorting the wounded officer Winter, after a frightened sailor has shot in his direction, go into the room on the right. Next to the safe point is a bed with a diary.

Item: Book of Dagon.
Chapter: The Air-Filled Tunnels.
Location: Robert Marsh’s desk.
How to find it: After falling on Robert Marsh’s head, kill him and look around the room. On the table is Sebastian Marsh’s suitcase, open it and take our Dagon Book. It’s the same book we had the whole game.

Item: Lab Notes of Ester Marsh.
Chapter: The Air-Filled Tunnels.
Location: Laboratory.
How to find it: Take the key from Robert Marsh’s desk and go to the huge cave with a bonfire in the middle, then go to the middle level and enter the lab. On the table on the right next to the pesticide is a diary.

Item: Tablets of Dagon.
Chapter: The Air-Filled Tunnels.
Location: Temple of Hydra.
How to find it: After killing the ancient flying creatures, climb up the plants and through the vent to the cave with the Temple of Hydra. Opposite the entrance is an octagonal pedestal table containing the Tablets of Dagon. You have to use the Book of Dagon to translate it.

Let’s look at the list
The Boston Globe, Arkham Advertiser and the postcard we get in the cutscenes.

As a reminder, to get 100%, in addition to the books, you must save Ruth, collect the rifle, and save enough sailors from dying (paragraphs 14, 15, and 19).

For Rank A, you need to get 100% within 4 hours and make no more than 30 rescues.

I spent a lot of time creating this guide, testing certain theories and conditions. Still, I might have made some mistakes, so please drop me a line if you find any.

Thanks for your attention. Have a nice game.