Call of Cthulhu

All the Hidden Items are showing up based on a skill check in the game. Theoretically you can have it at 30% also. Just reload the Checkpoint as many times as it takes... Same with the Padlocks.

Also I did have 100% occult at the end once but did not get the Farewell ending. So it must be based on something else

I did everything you listed and got the option to refuse at the end. I had 100% Occult as well. It might have something to do with choosing all possible Occult answers over the course of the game as well. +1.

I did exactly what Jotuns360Tag described, with the exception of the jail cell. I struggled and refused the knowledge. However it still worked perfectly. Had all 4 options at the end.

I also followed the steps that Jotuns360Tag described, and it also worked for me. Well done.
I'd like to add something that I believe is not key to unlock all 4 endings, but may be interesting for those who also want to go for the R'lyehian answer achievement in that playthrough.
I did follow Jotun's descriptions to the letter, with the exception of using the gas diversion in the asylum. I once used the electric diversion but did not lose additional sanity so I don't know how that works.
Anyway, in chapter 9 when you are back at the mansion. The R'lyehian answer to give Algernon was locked for me at first. In fact, I had to investigate Sarah's ritual and then when I returned to hand over the amulet I still got the option to give that R'lyehian reply.

I followed Jotuns360Tag's guide, but was also trying to complete additional achievements. I did reach the unholy books (another guide had said this was fine) and Irene was not driven to suicide. I don't know if one of those screwed it up, but did not unlock. Oh well.

@jotuns360tag - I did everything you wrote and got all four endings!! Thank you

I also followed what Jotuns360Tag said he did and got all 4 ending choices. Thank you! I really did not want to run through this a third time...

I was going for this achievement and chose to refuse the ritual. For some reason, the achievement did not unlock for me. After a hard reboot of my Xbox and a checkpoint reload everything worked out as it was supposed to.
Seems this achievement is potentially glitchy.

Just finished for the 4th time and still no "refuse the ritual". How can it be there are 2 guides that are polar opposites of one another, drink, dont drink, submit to leviathan, dont submit, save cat, no save mitchell. Literally every fucking option is different, now which is correct because ive done both to no avail

I tried to do it the way the achievement walkthrough described the first time and the second time I tried I used this guide. Both did not work for me. Instead, I used the guide that was published on xboxachievements.com. Basically, :
-Never drink
-Pushing Irene to the limit
-Accepting help from and saving Drake
-Reading all unholy books
-Choosing the first 4 possible answers in R'lyehian
-Struggling with the leviathan and refusing the truth
-Sparing Bradley
-Saving Cat
-Refusing medicine, flesh and gun
-Calling Sarah crazy
In addition I went for all the occult objects (which I ended up with about 65%). My character was psychotic in the end, btw.
I hope this helps.

Pretty sure only chapter 9-14 are the only chapters you need to do for the endings

The text option that leads to this particular ending is "It's Over", for those wondering.

I got it using Jotuns360Tag guide. I also collected the occult items but I failed a 1 or 2 R'lyehian checks as my sanity was too high during chapter 9 I think it was. I did have all 4 options at the end. Oh and Irene did not die in my run and I didn't investigate Sarah's room in chapter 9. I finished wuth only 60% occult I think.

I just got all 4 endings using the same steps as Jotuns360Tag (rewritten under Playthrough 2 of the walkthrough). I believe the key to getting all four endings lies in not reading the occult books. I did a second play through to where I followed the steps put forth by Jotuns360Tag, except I did read the books and found all but one occult item. My third playthrough I did not drink or read the books, and I missed two occult items. Still managed to get all four endings.

@Head Dragon. Thanks man, I finally got this achievement (which was the last one I needed) on my 3rd play-through by following your guide.

I can also confirm that this still works (12/06/22), followed it to a T and got all 4 options, Amazing job and thank you.

Jotuns360Tag's solution worked great, thank you for this !

I think you just have to have 100% Occult when you get to the end, which is tricky cause you need Spot Hidden at 50% by the time you get to the painter's bedroom to get the hidden sketch book and then have your Investigate at 75% when you unlock the cultist chest that's after the secret entrance in the study. Put all your points in Occult at character creation and then get all the Occult items.

(I posted this over at the 'Nameless Cults' cheevo as well :D)

Alright, I played this on PS4 rather than the XBOX, but still thought I'd add my choices. Seeing as I got access to all four endings on my second playthrough, and my choices were different from the ones stated..

- First of all, I put all points into 'Spot Hidden' on character creation
- I brought 'Spot Hidden' up to 100% as quickly as I could with earned character points
- I then brought Investigation up to 100% as soon as I could
- I divided the points after that equally across the remaining three categories

- Not only did I drink every time I could, but I exhausted the option to do so every time (3x)
- I think I found all the occult items

- I told Bradley to stay by the car
- I accepted Drake's help and saved him at the Shambler fight

- I interacted with all occult books, but refused to read them
- I started responding in R'lyehian as soon as I was given the option to do so

- I submitted to the Leviathan in jail and accepted the knowledge
- I killed Bradley
- I saved Mitchell and went back to check on Cat after

- I refused the medicine, the flesh and chose not to kill Fuller

- I chose prudence when it came to telling Irene about her husband but drove her to suicide for the trophies regardless
- I lied to Bradley about his ex, and gave him the R'lyehian response about faith after that

I did make some dumb calls that cost me some sanity along the way - like using the electricity to create a distraction, as well as investigate Sarah's ritual. But yeah, I had access to all four endings at the end, after choosing the final R'lyehian response.