Get 20 aspects.

Use your deduction at least 15 times.

Get 50 information for deduction.

Get 50 pieces of information for the codex.

Obtain the maximum profession tier.

Get the maximum profession tier in at least two paths in one playthrough.

Complete the game in True Detective mode.

Complete the solitaire in Haggis' office.

Before you enter his office, click on the security computer. There you will get to the option of finishing the game of solitaire.

Scratch Haggis's golden frame.

Next to the office’s door there is a portrait. After you click the Inspect option, choose to scratch it.
In the actual office, at Haggis’ computer, use Glazier to release the Diginet (Eleanor). This will make it possible to get an achievement later.

Help Starlett get out of limbo.

The Revitalization note in the Codex gave the clues. Here is the order of steps necessary to wake her up:

• Offer assistance
  
• Analyze the problem [Glazier]
  
• Activate the firewall [Glazier]
  
• Use jamming barriers
  
• Revitalize Starlett.
  
• Awaken her by stimulating her senses.
  
• Move Starlett's arm.
  
• Stimulate the sense of balance.
  
• Raise Starlett's head.
  
• Stimulate the sense of smell.
  
• Give her a piece of mint gum.
  
• Stimulate the sense of touch.
  
• Unfasten Starlett's helmet.

Help Ramon to force another player out from Twisted & Perverted.

You will meet Ramon if you go down-right from the starting point. When you do, agree to help with a 'player situation'. That player is Panisantor, the one next to Trepanator. Invite him to look at the unicorn and take him to Ramon.

Help Fredo in Like Father, Like Son.

When prompted to choose to leave Frodo with Jester in the game or take Fredo with you from the game, choose to take Fredo.

Complete all the fetchquests from Troll King.

After you choose the Trolls, go to the Unicorn and get the Ace of Spades from it. With that you will be able to summon the king. After summoning the Troll King (Herman Tik), he will sit next to Nena Sytnaya. Talk to him and agree to complete his quests in order to get the key to the theater. All of them involve the red car next to Umbra and are super simple to complete.

Surprise Jester in the theater.

While the Troll King gives you the front door key, he advices not to enter from there when you talk with him. He is kinda right, so go to the back alley to the right of the theater. There is a ladder there. Use it to enter the theater and you find yourself on a catwalk above the Jester. You will need to drop down on the Jester when he is under the ropes. Save the game here in order to reload if you time it wrong.
You can load the save here if you want to also try following the Clan Deduction. I prefered it only because I found the Troll King annoying.

Find all the clues written on the boards.

You can only get this achievement before climbing the ladder in Harvest Time.This is because the very clues on each board are there to help you find the ladder. Start with the board next to the platform. It will give you a hint where to find the next board. Each board gives a hint of where to find the next board. Read all boards until the achievement notification pops up.

Listen to the 3 tales from the Rusty Ed.

He is in the middle of the town, sitting on a barrel. Ask for him to tell you a story, listen to it. He falls asleep when he finishes it. Wake him up, ask for another story and listen to the end. He falls asleep again. Wake him, ask for story and listen.

Get 5000 Harvest Time's coins.

You can get rich by doing the following: if you helped Bob in Twisted & Perverted, you can ask him for money. You can steal it from Guy when he asks you to deliver three Loot Boxes to Fruity Betty. Using the Sleeves Profession threaten Lea-Anna to give you money.

Reach the Farm Level 5 in Harvest Time.

Easy to reach the level if you upgrade things in your farm. This can be done after completing the farming tasks assigned by Wild Poppy.

Fully expand your farm in Harvest Time.

You can do it by completing the tasks given by Wild Poppy for the farm.

Get a gun in Harvest Time.

The easy way is to ask Guy for a weapon as a reward for delivering the Loot Boxes for him.

Find two ways to reach the graveyard.

There are 2 way to reach the graveyard: via the saloon roof or the well. The well is in the northen part of the town.

Help the Outlaw escape in Harvest Time.

When you first talk with the Outlaw, offer to get her a ticket to the train. You can get the ticket for free if you keep watching Guy after you completed his quest. When a ticket appears from a loot box, he will remember your help and offer to give the ticket to you. Go with it to the Outlaw. The journal will then update to meet at sundown with her. Just go to the graveyard - talk with the mysterious gamedec and then when you press to exist the graveyard, choose the Deduction Get the Outlaw. After that, when you exit you will find that the Sheriff declares a duel against her. Intervene to give her time to escape.

Defeat the Sheriff in a duel.

To have the opportunity to duel him, you must choose the Deduction Get the Sheriff. After that, select these options to win:

• Restrain your movement.
  
• Make eye contact with Ken. [To have this option you must have agreed for Ken to help.]
  
• Watch the Sheriff's shadow.
  
• Wait for the Sheriff's move.
  
• Give Ken the signal.

Other options can be used too but this combo worked for me.

Make Ken a pretty straightforward proposal.

After finishing with Harvest Time, you and Ken will go to your apartment to discuss the case. You can offer for him to stay the night in your bed. Thus, you’ll be able to sleep with him.

Search all the trash bins in Fallen Hero.

There are 3 trash cans on the streets and are marked as active objects you can interact with.

Meet the diginet in the street.

You can only get this achievement if you freed the Diginet from Haggis's computer back at his office.

Create Ken's V-Ghost from his psychoscan.

This is a story achievement. You cannot miss it.

Explore all death hypotheses in Fallen Hero.

To earn this, you'll need to collect all the clues relevant to Ken's death.. This includes inspecting his body.

Order a whiskey at Yet's bar.

You can order it at the bar or via the robot server.
After drinking make another saving. You will have to choose between earning the trust of the Sleeves or the Trolls.

Gain Trolls respect in the bar.

You can do so by doing the following:

• Write on all four wall posters of the bar.
  
• There is a woman in purple next to the bar. Talk with her and she will request to spike Marten Aidan's drink. He is sitting at the bar. You can get the drugs from Cam Grozny.
  
• At some point a fight cutscene appears next to a bar, select the option to stop it and then side with the Trolls.

Gain Sleeves respect in the bar.

You can do so by doing the following:

• Replace all three wall posters with Ken's poster. His poster is next to the bar and you have to select the option to copy it, then go to the other posters to select to replace them.
  
• Order a whiskey at the bar.
  
• Have a drink with Trepanator. He is at the same table as KillThemAll.
  
• Go to the DJ (he is on the left side) and play a song for KillThemAll in order to wake him up, then go talk with him, let him do the talking and just be nice to him.
  
• When the fight scene appears next to the bar, just observe.

Use the brainfix on yourself.

It does not refer to the Profession. It is about the Brainfix machine next to Cam Grozny. You have the chance to use it as part of the story, when Yet asks you to get rid of Cam.

Gather 3 Poteto Gomuins in Knight's Code.

There are multiple ways to gather them. At the start by completing the errands of the Alchemist, Disciple and after talking with UpYours314 or Angry Aardvark by reporting them to Umbra. Inside the stronghold, you can complete tasks to pile Poteto Gomuins or create them with the Forge.

Use the cat go through the gate.

At the starting area of the VR, a cat wonders around, you can click on it and if you have the Cheater Profession, take control of the cat and cross the gate bypassing the guards and their trial.

Get to Umbra's House.

Her house is on the left side of the main square. You can enter it by picking the lock or by completing Umbra’s Tasks.

Do 5 quests for the Clan Masters in Knight's Code.

The Clan Masters are Umbra, Vault Keeper, Eternal Cocoon and Rock Borer. Be careful how you time your actions with the bells. It is recommended to complete Umbra’s tasks so you can get on her good side. This will help you get 2 more achievements later.

Collect 10 iron.

During your Trial Period in the VR, click to pick up the Iron from the ground. The Iron is a resource for the Forge.

Create 5 items in the Forge in Knight's Code.

For this one, as I already had a ton of Iron collected, I forged 5 Insignas. It took 10 strikes of the bell.

Collect 5 memories of Ken.

In prison, you can hob on items that lead you out. The items with a question mark represent Ken’s memories.

Break out of prison.

Escape the prison to earn this achievement.

Unlock all Codebreaker modes.

There are 3 Codebreaker modes. You can unlock them by following these paths:

• Green - Green - Green: This leads to the Tree of Knowing, where you'll unlock the Yellow Aspect.
  
• Green - Yellow - Green: This leads to the Expanse, where you'll unlock the Red Aspect.
  
• Yellow - Red - Yellow: This leads to the Archive, where you'll unlock the Blue Aspect.

Find Bliss in Axis Mundi.

Follow the Blue - Green - Blue path.

Find the Harvest Time rift.

Follow the Yellow - Green - Yellow path.

Find Morty the robot in Axis Mundi.

There are multiple paths that lead you to killer robots. One of them Green - Red - Blue path.

Find the Panda's diorama in Axis Mundi.

This is a random asset encounter. Explore the generated paths until you happen upon the Panda showcase. You can try different combinations of colours and you’ll find it eventually.

Visit 15 different locations in Axis Mundi.

This is self-explanatory and visiting so many locations increases the chances to encounter the Panda’s diorama.

Get to Paradise Beach.

This is a story achievement.

Lock three characters in the loop in Paradise Beach.

This is a story achievement.

Help Rhonda find her son.

Umbra can stop her execution if you ask her to join you. This can only be done if you and Umbra are on good terms (you completed her tasks in Knight's Code). When you meet back up with Rhonda , and you'll earn the acheivement.

Gather a team of at least three people.

Making her stop the execution means that Umbra, Bob, KillThemAll, and Haggis will join you. Basically the maximum number of people you can take.

Destroy the simulation.

Pick option 'Number Three: You turn off the Simulation completely'. Option available only if you killed the CEO in Paradise Beach.

Agree with the simulation owners.

Pick either options Number One, Two, Five, or Six.

Escape from the simulation.

Pick option 'Number Four: You leave the Simulation, escaping'. Available only if you decided to kill someone during your playthrough.