This guide goes through the story as fast as possible marking every important thing to do including achievements.
If you just want the achievements there's a guide that is way more simplified.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1449086895

OFF we go then!

Grab your hat on the Iquewa drawer before going anywhere.
Optional: Take a shower you nasty fella.

Go on the left door.







SECONDS BEFORE THE DISASTER
Find your steel friend on his beloved box to get the key to open the door on the left.






Your best friend Garcia will introduce the disaster on every option except the last one. In this option you will get off with him in the taxi.




Look at and touch every painting on the station walls, this will also need to be applied to the inside of the train to get the achievement.
There are 5 paintings here. Also enjoy this time to give some money to the band.






Ask Garcia about his kid, you need to get the kid before going to the train.







Now that Garcia’s child follows you, get the first class tickets with Mr. Olive Oil - I MEAN- Oliveira. (Any other will lead to this)

Garcia’s son gotta pee. But you don’t care. Talk to everyone in every wagon until you reach Mr. Oliveira. Attention to the football fans that will unlock a sidequest.






Also don’t forget to look at and click on the art.


Same goes for the second wagon, talk to eveyone including the very rude students.

Beware, your robot is not very polite. And again, don't forget to look and click on the art.

Going in the bar wagon, you can see a barman that resembles someone and Mr. Oliveira that will block the door to the first class. To pass you will need to choose the third option, he loves to talk about his gym routine. Instead of going madman through the door, check the good looking ad on the wall.




FREE THE KID, poor child wanted to pee so bad, now he has the bathroom all for himself, and you have the time to talk to eveyone in this wagon.






After talking to Mr. Monopoly, look and click on the art.
Take the left door and VRRR... NEXT SECTION LOADING...

After moving trough the portal door you will find that some of the passengers you talked to are not there anymore. Enjoy this moment to collect teeth (in green), the moustaches (in purple), a train ticket (in beige), the cane (in yellow), the hat (in white), the chart of the obliterator (in red), the cassette (in blue) and the smoking pipe inside the bench (in pink):
Attention: The tooth situated left near the cane and next to the glass is tricky, you may have to exit and reenter the wagon for it to show up.


If the bull**** from the football (soccer) fans annoy you, relax, we will solve this later. If you can't click on the items now they will be there when you come back.

Now, on the second wagon, we have additonal teeth (in green), the moustaches (in purple), the cassette (in blue) but also other evidence like: a business card from Mr. Francisco Fonseca (in orange), the Bongos (in white), the YesterdayLand festival posters (in red), a checked ticket (in beige, open the seat and get it), and a blanket (in yellow).


PROTIP: READ MR. FRANCISCO FONSECA BUSINESS CARD FOR A HINT TO OPEN HIS LUGGAGE.

NEEXT, the bar wagon. Here you can find suspects to investigate, and a cassette tape (in blue).


Very important to notice this suspicious individual cleaning up the blood. Talk to him.

Talk to everyone to unlock items to collect. If you haven't collected before, get the cassette (in blue), a disguise (in white), a sandwich (in yellow) and a soda can (in red).



Very suspicious that Mr. Manuel took off the disguise, he feels very comfortable in the bar and does not want to be interviewed. After you collect the items above you can talk to him and pull the bar plug (in black).


Next we go to the first class. Now our litte friend walks around and we can find these items: teeth (in green), cassette (in blue), moustaches (in purple), a monocle (in yellow), headphones (in white) and a whistle (in pink).


In the image below, pay attention to the tooth inside the oyster, and Mr. Francisco's suitcase (in red) that cannot be collected but you can put his password that can be found on his business card. There is a achievement "Castanheira" that you can do by setting the password on the suitcase to 160994. Back to business. The password to Mr. Francisco's Fonseca luggage/suitcase is: 120159. Inside you will find a weapon.



Now, let's go to the first class bathroom.
There you can find teeth (in green), cassette (in blue), moustaches (in purple), a lighter (in red), a very hidden button (in pink) and three festival tickets (in white). ALSO, DO NOT FORGET TO LOOK AND CLICK ON ALL OF THE PAININGS, INCLUDING THE ARROW PAINTING.


If you press the very hidden button a toilet will appear from the ground, pull the toilet's flush mechanism (in red) to dry the fountain and find the Obliterator (in yellow).


Now, take the left door and back to business!

If you did not collect the whistle (in pink), collect it in the first class wagon, on top of the chess table.



Now to the first wagon and talk to the football (soccer) fans. Since nobody cares pick this option.



Badabim badabom they fly off the train.

After kicking the football (soccer) fans out, you can unlock a side quest by talking to the HyperGraduated human on the second wagon.








Now go to the first class wagon, if you are curious you can find the student in the first class bathroom window, but he is very sneaky and does not want to be seen. So, set a trap for this bastard by picking the items in red.



After gathering the perfect items for your trap enter the bathroom and click on the window.
At this moment the first class bathroom should look like this.

Get out of the bathroom and Case will hold the line to catch our fresh fish. After the successful fishing, get back to the bathroom and catch the box.

With the box in hands, get to the HyperGraduated teacher and choose the fate of the freshman.

Slender man on the right of the bar wagon, Mr. Francisco is very suspicious. If you have already opened his suitcase, got his card, train ticket and weapon you will unlock his interview.
ATTENTION! To get the "Everyone Hates Case and Bot" miss the first question of every interview.
Now, to the nitty and gritty.



To win this interview you must use Bot. If you use Case and get every question right Francisco Fonseca will not crack.

Old couple getting divorced? Very suspicious. To unlock the interview get every teeth, get the old man's cane and the blanket. Also! You will need to fix the denture yourself in a minigame.
To reach the minigame get to the first wagon and click on the denture's glass.




On the minigame to get the achievement "What’s up, doc?" Place the four front teeth on the denture, 2 on the top, 2 on the bottom. Follow the images below for help.

Have in mind that the place of every tooth in the denture is hinted by the color of it.

Here's how it looks almost complete:



Once you finish the minigame, go talk to the old couple. ATTENTION! To get the "Everyone Hates Case and Bot" miss the first question of every interview.






To win this interview you must use Case. If you use Bot and get every question right, the couple will not crack.

Mr. Monopoly (Ergo) using glued moustaches? VERY SUSPICIOUS. To unlock this interview get: every moustache, a monocle, the hat and place the best moustache combination on him by doing the minigame.

To start the minigame talk to Mr. Monopoly (Ergo), he will ask you to place two mostaches that fit together in his face.
ATTENTION! In this minigame you can get the "Awful physiognomist" achievement. To do so, get 6 combinations that are not the one showing to the left of his heart.

Now to the interview. ATTENTION! To get the "Everyone Hates Case and Bot" miss the first question of every interview.







To win this interview you must use Case.

Mr. Paulo is carrying a big backpack, that could fit a weapon. VERY SUSPICIOUS. To unlock the interview get his bongos, lighter and pipe. After getting all of these talk to him and start the bongo mini game.

Since this game is randomly generated the only tip I can give you is to draw the 4 bongos on a paper and put numbers on the side of each bongo that gets played by order. Like this:
ATTENTION! In this minigame you can get the achievement "Deafening silence", to do so, play this minigame with both sound and music disabled. You can do so by setting your pc volume to zero.



NoOoo-w, woah this s*** is gooood maaan.... Th-the intt-terrview.
ATTENTION! To get the "Everyone Hates Case and bot" miss the first question of every interview.




To win this interview you can use both Bot or Case.

These three girls are right in front of where the janitor died. Still, they are smiling. THIS IS VERY SUSPICIOUS. To unlock the interview get every cassette, the festival poster and the festival tickets. After gathering all these items talk to the girls and complete the cassette minigame. It consists of a character that needs to get every note on the scenario before getting to the flag in the right.


ATTENTION! In this minigame there's a achievement called "No one left behind". To get this, complete the game without losing a single life. PROTIP: write down the number of the line and column of every note, for example, in this picture I would write 2(line)-3(height) 5-4 6-4.





Now for the interview.
ATTENTION! To get the "Everyone Hates Case and bot" miss the first question of every interview.




To win this interview you must use Case.

Mr. Manuel was wearing a disguise before the first body hit the floor. THAT'S VERY SUSPICIOUS. To unlock his interview you must get: his disguise, a sandwich, a soda can. Also you need to unplug the bar from the wall (pull the bar plug). You may have to wander around the train to wait until the bar gets completely dark.



ATTENTION! To get the "Everyone Hates Case and bot" miss the first question of every interview.

To win this interview you must use Bot.

Mr. Oliveira is the guard of this train, nothing must pass these muscles, yet, all of his items were scattered. THAT'S VERY SUSPICIOUS.
To unlock Mr. Oliveira interview you must get: the chart of the obliterator, the obliterator and a checked ticket.

ATTENTION! To get the "Everyone Hates Case and bot" miss the first question of every interview.

To win this interview you must use Bot.

The pile of corpses increases your self-doubt. Also the doubt of everyone else in this madness. EVERYONE IS A SUSPECT.










Talk to Bot and select the last option.








OOh boi, you are in the past now.
Take the left door twice.




Now talk to Garcia. And Inside the bar talk to him again.



High again Case? Now, walk to the left and take the left door twice.







Case... You found YOURSELF!
AHÁ!! Now talk to yourself and by doing that you will see some items around. These will help you on your interview with yourself.






Talk to yourself and unlock THE INTERVIEW. ATTENTION! To get the "Everyone Hates Case and bot" miss the first question of every interview.

While you recovered, Bot did the hard work and placed mannequins to help unravel this mystery. Now, talk to bot and investigate every mannequin/part.




After investigating IT'S PHILOSOPHY TIME!
Here are the answers you must pick:


Now it's time to test the theory, grab the helmet. And talk to Bot.


The beer drink will be unlocked. To watch the final cutscene, drink it.

But, if you want to find the achievement "Another hidden monkey!" make sure you have already done all of the above, then, go to the first wagon and click on the tail near the window. Get to another wagon and go back to the first. Then talk to the lovely monkey.


I hope you had fun. Thanks for playing! :)