Dont forget - spoilers!
So. Im happy that you reading my text.
My english not so cool but i will try.
I was playing on Normal and as Umbralist/Bounty Hunter
If you have any question or if you found something, that i dont have in this guide - you can writ in comments. Thank you
Good luck!

And the first - you can see that door above big hall. Behind the door you need to kill monsters,in the chest you can take a Serym X. Its for commanders.
After that go into the hall where you can take a quest. The body lying on the table near Wherewolf .
Speak with body and then kill her. You will get a potion +5 to poisons resistance.
In the place where you need to open a Vlad look at the near cell , here is a Daywallker.Speak with him. Its a black man, vampire and dont fear the sun,but he is a vampire killer and a sword master. Its a Blade.
After killing boss - go in the right corner. Fiend a cupboard, Katarina will start speaking about Serym X. Then walk down the stairs. Search for the Control Panel and use it. Water will go down.and achievement Murky Waters . When water will out you can open a chest near the panel and one in the start of location.

Go to the middle of this map and activate a crystal. You will need to kill monsters and will spawn items like a rings.
If you going left from start position you will see that Mystic Gong, touch it. Spawn monsters.
Then go up in the left corner. Complete the maze. Here we have 2 things: Big White Bug (I think its from Alice in Wonderland) and a Cookie House from famous story. Speak with woman and get an achievement The Grimm Truth.

Awwwwwwwww so cute! This is a Godzilla! Raaaawr. In opposite of this dino you can see a statue of frog. Activate it. You need 3 more (orange points) After touching all of them.The answer of this riddle is the pit (its in the start, near the gnome).
Dont forget to get a quest from house (kill Godzilla). When you complete mission - travel to the Secret Lair and speak with Alchemist (he will make a potion +Willdpower and achievement Into the pot with ya'.

Go in the top of the map. Here is a portal or grave. Press rocks like in the screenshot. Achievement Hellgate Borgova
Now you need to reach this place. Its a help to getting loot. (its a secret, yes)
Okay. I pointed gates at the screenshot. 1-2-3-4-4-3-2-1 lol. And loot all yours!

Here is a list to do:

• Youve found an killed the Eater of Light
  
• Youve make a death wish
  
• Youve meet a Daywalker
  
• Found the Contarsoils Serum documents
  
• Underwater section of laboratory
  
• Katarina git that gong
  
• Hit the Crystal
  
• Youve uncovered the true story of Hansel and Gretel
  
• Riddle of Frog Statues
  
• Skrimbeast potion
  
• Youve closed the Gateway
  
• Hint to reach the loot
  
• Get the loot from magic chest

13 of 13. Eh, finish with that.

After saving peoples, touch this thing like on the screenshoot. "Property of Robbers"
Next you need to touch Street Bench (you can see that). And move to the green arrow, here will be a quest. A dying man, you can kill him, go out, or get him to Vlad. If you choose Vlad you will get achievement Set a wolf to mind a sheep (you will need to return in Secret Lair and speak with Vlad). In the way like you going to this place near the little stairs, you need to touch a column poster (a thing with announcements): "Seminar with great monster killer Von Helsing. 5 gold only"

Moving to this corner and look on this big dog. Dont know what the f**k it this...
Next go up, and move very close to this airship and you will geta achievement Deflator.
After that speak with the man ( red circle on the screenshoot). Its a winner, who defeat Ringmaster.

Go up and speak with that creepy man. Sell him a chocolate for loot! And also get an achievement I came for Desert

Go down, in the middle of the map you need to fiend this grave, and touch this. Achievement! her little pony (its Irinas pony, Irina - sister of Katarina, eh).
Next go down to the wall. Activate this braziers (dont remember which one first) , when you activate it in right position will spawn a teleport. Thanks that girl Xenodewa for helping!

Okay, that the final of chapter two. RED - dont go in this area until you get last 2 secrets.
First - touch a statue. Purple on the screenshot. And dont forget to speak with this two ghosts!

Tam tam tam here we go:

• Property of Robbery
  
• Read advertisement on monster hunter seminar
  
• Looked under the Bench
  
• Saved the man, who was bitten by vampires
  
• Talked to gladiator who defeat Ringmaster
  
• Sabotage the airship
  
• Found a f**king strange dog
  
• Sold a chocolate to the undead
  
• Tomb of Lady Irinas pony
  
• Riddle to hidden treasure
  
• Found a statue
  
• Met dead Lumberjacks....again.

12 of 12. WhooooooHooooo!

Move here, there is a hidden loot in the grass.
In one of flying island will be a statue ( if you accept quest, you will fiend it very easy). Horned Statue - touch it. Near the body in the right corner you can fiend a hidden relic in the haystack.

After reach houses move to the right. Speak with gnome. Winter is coming! (achievement too)
this is from Game of Thrones, but i think you know..
When you reach the top, behind the statue head live a rabbit. KILL IT! (its a Monty Python easter egg, developers really love it. In all 3 parts you can fiend eggs from Monty Python.) You will get achievement What? Behind the rabbit?
Aaaaand in the end of this place - open that chest. 5 essences. Its a Beard Grease urgggh..

Take a quest from Dreamer (must do it). For completing that your reward is a ring! BUT! If you out from Ink ring will lost stats. So, when you out from Ink go to Alchemist. And accept his offering. Swap that ring for another ring with unknown stats.
Okay. Now. The best one! Its a Space Marine! And his Bolter (for inquisitor only). Really nice one, this dead warrior from Warhammer 40 000.
Reach middle of the map an touch that house. "Cabin in the woods". You will get achievement. This cabin from film "The Cabin in the Woods"

Move to the right corner and touch this portrait.
Then go up on the stairs and touch this one. Will drop a book (+5 to Body)

After spawn just move to the top. and you will reach this one. Its a TARDIS (doctor Who).

Okaaaaay. Lest look:

• Touch the horned statue
  
• Hidden loot in the grass
  
• Winter is coming...
  
• Youve defeated a Blood Rabbit
  
• Hidden stash of Beard Grease
  
• Strange armor from grim future
  
• Cabin in the wood
  
• Portrait
  
• Swap the Dreamers ring
  
• Hidden book
  
• TARDIS console

Eh. 11 of 12. Not so perfect.
Maybe you will have a better luck and watch carefully than me.

You need to run faster! Kill that b****s and if you was too fast. You will get achievement you are too young for this . That was a Domovoi - suicidal . and you killed him. Bravo.

Talk with that ghost and you will get achievement.
After that accept quest (about flesh and Titan meat). Complete it and when Katarina ask about Titan Meat - say "yes" and eat it. +30 to HP.
Dont forget about this buddy. Its a Fulmigatti ghost, eh. Speak with him.
When you reach the sword - go to the point like on the screenshot. And read about Kratos - Godkiller

Near start point speak with monster about his family. Then go like on screenshot and touch this thing in the corner. You will get a cooking bock!
Before you go down touch this body (i know its not a body) and get an achievement the final clean up and a relic.

Aaaaaand the last:

• Killed a suicidal domovoy
  
• Taste a Titan flesh
  
• Met a ghost aunt
  
• Met a Fulmigati ghost
  
• Sword
  
• Met the friendly monster (about family)
  
• Cooking Bock
  
• Fragment of Koscheis Death

F**k. 8 of 9. Eh. Not perfect...

Thank you very much for reading this text!
I lost 2 secrets, maybe you will be more lucky
Really hope that it will help you. If you still have any question - write it in comments.
If you want to thank me (sometimes that happen) so here my link trade .
Good luck!