There are in total 43 achievements in this game. There is also one guide in russian that you can check it out too, if you want. And one with infos of various Classes and Skills. The proberly most important skill you should take after you killed Mammon is the "Chance of finding rare items inscreased."

You need to play the new game+ (Inferno mode: harder enemys) to get all the lore pieces and crafting recipes and items, but at least you can unlock all of the cheevos in the easy difficulty and disable the traps for QoL comforts. Expect for one instance where you need to switch to normal difficulty to farm one specific item.


Spoilers: Make sure that you collect every lore piece and crafting recipes in the normal run, once you beat the 6 bosses in that one map and enter the last boss fight, there is no going back. Its located on the last map of the game, on the right path in hell. It's very important to craft the items #1-8 in your normal run, cuz afaik you can't get some items you need in inferno. The devs made in the game version 1.4 possible to craft the recipe #8 so theres that. But if you are still missing like me e.g. #7, you have to replay the whole game again with a new character. You can technically still collect the items you need in inferno but they are not the same even if they thou share a similiar name. For example: For #7 you need "Elder Branch Of The Archonteon" and in ng+ you only get "Pure Elder Branch Of The Archonteon". Even if you try to craft it, it will simply not work.

The translation here is also kinda "broken". E.g. in the crafting recipe it says you need "Bestial Ripper" but I could not find it and instead it worked with "Savage Ripper". "Afterlife Guide Staff" = "Aferlife Passer Staff" for some reason. Etc. So you need to experiment sometimes a little bit and not worry too much cuz you can not craft random stuff and loose items, only the things which are available in the recipes are craftable.

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These four are straight forward, so not much to say here.

These 16 are also just straight forward and no further explanation needed.

You need to do up to 170 damage per second to get all four of 'em. I didn't had any problem with these so there is my build which I stole shamelessly from some guy on youtube: https://www.youtube.com/watch?v=F3bf9fFynpM

There is also a newer build which is supposed to be better overall, but I don't know if it will unlock these, cuz I didn't test it myself (yet): https://www.youtube.com/watch?v=ZuWXCGSGC6I

Here is my build with the class "Lucifer":

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To collect every lore notes and crafting recipe you need to play new game+.
If you got everything it should look like this:
2xStory notes
16xCrafting recipes
9xLore notes

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There are in total 10 anomalies you need to listen to. For me it unlocked after listening to just 9. Luckly no need for ng+ here.
The locations in no particularly order:

• Mine Of The Demon
  
• Abandoned Fortress
  
• Millgraf
  
• Tomb Of Heroes
  
• Henge Of Nivlath
  ///////////////////////////////////////////////////////////
  
• Cursed Vale
  
• Troglodyte City
  
• Abbatardes
  
• Archonteon or the left path in Hell. It unlocked here for me
  
• On the right path in Hell

UPDATE: Almost all the weapons can now be bought at the merchants.

You can buy all the crafting materials, if you dont want to farm them. The Weapons drop most of the time at the same map as you find the recipe for it. You later unlock a Trader after you save him in the Lair Of Zarrek. He sells also crafting materials and is cheaper overall.

#1
• Short Sword or Guard Lance or Dagger
  The Short Sword can be bought at the first Blacksmith (Forge) for 25g
  
• Silver Funeral Mask
  Can be bought from the Trader whom you saved for 90g
  
• Iron Ore
  Can be bought at the first Blacksmith (Forge) for 70g

#2
• Pilgrim Staff or Lich Trophy or Ritual Knife
  Lich Trophy = Skeleton Trophy can be bought at Refuge (Treehouse) for 250g
  
• 2 x Iron Ore
  
• Owl Bone
  Can be bought at Refuge (Treehouse) for 135g

#3
• Bestial Axe or Torture Cleaver or Ferocious Slasher
  You can farm the Bestial Axe in Cursed Vale You can now buy the Bestial Axe at the merchant.
  
• Infernium
  The Infernium Ore can be bought from the Trader whom you saved for 100g or farmable inside the red portals
  
• Demon Tooth
  The Demon Tooth can be bought from the Trader whom you saved for 120g or farmable inside the red portals

#4
• Arkandia or Bone Hammer or Short Dual-Blade Sword
  The Short Dual-Blade Sword can be farmed in Troglodyte City. The Short Dual-Blade Sword can now be bought at the merchant.
  
• Infernium
  
• Abyss Coral
  Can be bought from the Trader whom you saved for 125g

#5
• Troglodyte Golden Axe or Sabre Of The East or Virtuoso Blade
  The Virtuoso Blade can be bought from the second Blacksmith (Workshop) for 620g or farmable in Troglodyte City and Lair of Zarrak
  The Troglodyte Golden Axe can be farmed in Troglodyte City. The Troglodyte Golden Axe can be bought.
  
• Cobra Venom
  Can be bought from the Shelter or Workshop for 390g
  
• Pigments From High-Kolkhaz
  Or High-Kolkhaz Pigment called, can be bought at the Shelter or farmable in Abbatardes.

#6
• Tower Guar Bow or Abbatardes Guard Sword or Abbatardes Guard Lance
  Abbatardes Guard Sword = Abbatardes Soldier Sword
  The Sword and Lance can both be farmed in Abbatardes. The Sword and Lance can now be bought.
  
• 3 x Stones Of Arbenia
  Can be bought from the Shelter for 250g

UPDATE: According to some players in the comments, you can farm all the items for #7 and #15 one the left side of the map, the chest. In my test runs, I was super unlucky with the chest and thought therefore that one item is farmable only on one side and the other on the other side. I swear I tested it for WAY TOO LONG and was still unfortunately super duper unlucky.

#7 You can farm both items only in Archonteon. For the best strategy look at #15 in Part 2
• Olive Branch or Elder Branch or Poplar Branch
  Elder Branch = Elder Branch Of The Archonteon (Does not work with Pure Elder Branch Of The Archonteon)
  
• Crystal Ring Of The Archonteon

#8 This is the only one you can unlock also in inferno mode as long as you have one of the three weapons you need from the normal run. If you are planing to craft this item in this run, then good news, the item drop rate got increased!
• Guard Trident or Knight Blade-Whip or Lava Mace
  
• Infernal Torch
  Can be bought in inferno mode from the Trader whom you saved for 500g.
  
• Demon Lung
  Can be bought in inferno mode from the Trader whom you saved for 700g or farmable at the map with the 6 Bosses.
  
• Minor Demon Eye
  Can be bought in inferno mode from the Trader whom you saved for 650g.

Dont sell or destroy your orange crafted weapons! You will need it for #16

#9
• Short Assassin Blade or Penetrator or Dagger Of Betrayal
  The Short Assassin Blade can be bought from the first Blacksmith for 780g.
  (I didnt tested that myself) Penetrator -> Gallant Piercer
  The Penetrator can be bought.
  
• Sacred Silver Funeral Mask
  Can be bought from the Trader whom you saved for 170g.
  
• Pure Iron Ore
  Can be bought from the Trader whom you saved for 250g.
  
• Monster Fang
  Can be bought from the Trader whom you saved for 270g.

#10
• Lich Relic or Leader Staff or Large Claw
  Lich Relic = Skeleton Relic and can be bought at the Treehouse for 1650g.
  The Large Claw can be bought from the Shelter for 710g.
  Relic -> Infernal Relic Of Bisith
  Staff -> Afterlife Guide Staff: Can now be bought.
  Claw -> Abominable Transmuted Large Claw
  
• Animal Skulls
  Can be bought from the Trader whom you saved for 135g.
  
• Ancient King Tooth
  Can be bought from the Trader whom you saved for 185g.

#11
• Ferocious Slasher or Savage Ripper or Torture Cleaver
  The Savage Ripper can be bought from the Trader whom you saved for 350g.
  The Ferocious Slasher can be bought from the second Blacksmith for 750g.
  Torture Cleaver = War Cleaver and can be bought from the first Blacksmith for 650g.
  Cleaver -> Call-For-Murder Cleaver
  
• 2 x Demon Tongues
  Can be bought from the Trader whom you saved for 190g each.

#12
• Arkandia Of The Skies or Nightmare Double Blade or Hammer of Resurrection
  The Arkandia Of The Skies or Nightmare can be bought from the second Blacksmith for 800g.
  Arkandia -> Monstrous Arkandia Of Septhon The Insane
  Blade -> Innocent's Flesh Eating Hydra
  Hammer -> Apocalypse Dusk Hammer
  
• Virgin's Flesh Crystallised In Children's Blood
  Can be bought from the Trader whom you saved for 220g.

#13 There are two ways to craft this:
1. Afterlife Passer Staff + Infernal Relic Of Bisith
   OR
   
2. Call-For-Murder Cleaver + Apocalypse Dusk Hammer

#14 There are two ways to craft this:
1. Innocent's Flesh Eating Hydra + Gallant Piercer
   OR
   
2. Abominable Transmuted Large Claw + Monstruous Arkandia Of Septhon The Insane

#15
• Ring Of Gzimeroidas Perpaxses Anamenorpidus + Sceptre Of Thermistophles Xenozytarch
  How to farm the Ring: Thats one of the two most annoying parts of the game, because the Ring and Sceptre have a very low droprate (The drop rate just got increased with the latest game update. Thanks Dev!). Thats why we will be save scumming to make our lifes way easier. For the Ring you need to go first to Archonteon where its the only place you can get the Ring (The left path in Hell)
  Fist set the game difficulty to easy if you haven't already, then go to the bottom left part of the map. Set your Threat level to safe by fighting here. After that, save your game. Now if we are lucky we are able to loot two chest here. If you did not get the Ring simply press Alt+F4 and restart. It takes some time. It took me couple of hours. Thats why I was listening to a audibook in the meantime. There is also a chance to activate a trap, thats why we disabled it. And there is a chance that we encounter enemys. In that case we Alt+F4. Thats faster then killing them. I dont know a faster way to farm it.
  How to farm the Sceptre: same as the Ring on the same spot with the same tactic. You may get duplicates but keep trying, till you get both the Ring and Sceptre (Branch and Ring in Part 1)! , but only on the right path in Hell. You can only farm here the Sceptre.
  
  First get rid of your Threat level, then save. You can, like me, kill all 6 bosses then Alt+F4 if you dont get it. Or farm only one boss where you have the least difficulty.

#16
• 3 x Orange Weapons/Items from crafting
  Does not work with the wapons/items found in combats.