All these achievements are obtained through the story.
I strongly recommend you starting the game on Extreme difficulty.


It's your turn now.
Pick up the briefcase.




First encounter.
and so it begins.




No way, subway.
Escape the Subway.




Clubbed out.
Escape the Nightclub.




Big-city break.
Escape the Blackout City.






Cast into the void.
Cast the Briefcase into the ocean.
While on the ferry, leave the cabin and throw the briefcase into the sea.



Pathetic
What have you done...
While on the ferry, give the briefcase to the child in front of you.



Galaxy Brain Award
An intellectual, I see...
At the beginning of the game, instead of taking the briefcase, turn left and exit through the fence.




Good for you lil buddy.
From New Game, complete all levels on Easy Difficulty.




Thanks for playing.
From New Game, complete all levels on Normal Difficulty.




You're a gamer.
From New Game, complete all levels on Hard Difficulty.




No, YOU'RE a gamer.
From New Game, complete all levels on Extreme Difficulty.

From New Game, collect all 7 rotary phones.







After retrieving the briefcase, go down the corridor and look behind a burning barrel.









On the train, in the second car, look under the seats on your right.









Inside the subway station, after leaving the train, use the stairs and go left.
The phone will be between a pillar and the seats.







On the beach, after talking to the homeless man, look behind a big rock.









In the nightclub, look behind the stage; the phone will be on a barrel.









In the public square, in the clothing shop called Storefront, look in the right corner on a cardboard box.








On the ferry, go outside and turn left.

SPEED GAMER
Beat the game in under 15 minutes.




BEAT THE DEV
Beat the game in under 12 minutes and 15 seconds.




These two achievements are probably the most difficult to obtain, but they’re not overly complicated.
To complete this challenge, play the game on easy mode. Keep in mind that luck plays a role, as item locations and locked doors are randomized.

The most important element is managing your stamina and inhaler usage. It can be tricky during your first run, but you’ll soon get a feel for how much stamina you need to finish each level. In the subway station level, you can recharge your inhaler while searching for coins in the bins and seats. You can also recharge it during level transitions, as long as the inhaler is equipped.

In the nightclub, the first-floor wristbands can be found in the lavatory or on the counter. On the second floor, they may be located in one of the two dressing rooms or on the counter behind the main bar. The key is on the counter of the third floor.

In the Blackout City level, always charge your inhaler during the door-opening animation.
If you've been fast enough, the achievement should pop as soon as you reach the ferry.

Full Run Example for Beat the Dev Achievement.




Oh my god...
From New Game, complete all levels on NIGHT DIAL Difficulty.




For this achievement, you can use the same strategy as above. Be sure to take time between hunting phases to fully regain your stamina and pre-charge your inhaler. Always try to follow the same path; after a few attempts, you'll quickly get the hang of the follower's pathfinding.

Tip from BruteSSH.exe:
You can reduce the master sound volume to 1%.
This way, you'll be able to hear the footsteps of the entity behind you.