Welcome to the guide that will help you hunt every single on of those achievements no matter how obscure. The guide has been broken down into sections for each faction as well as general single player and multiplayer sections. If you have trouble locating a specific achievement, you can use ctrl+f and write a part of the achievements name to find it.

If you spot any errors or would like to add information to this guide, please do so in the comments. I am unable to test all of the achievements myself, so help is appreciated.

Finally, I'd like to give a shoutout to The Milkman and Burn for inspiring this achievement guide with their spectacular work with the previous titles in Total War.

A finnish language translation is coming at some point. If you would like to help with other languages, please feel free to contact SanSamurai.

Finnish / Suomi:
Under Construction

These achievements are not faction specific, although it is possible that only a limited number of factions may be able to achieve them. If there are faction limitations, they will be noted in the achievement text.

Adventurer
Fight a quest battle.
Each faction has a legendary lord or multiple legendary lords who can gain unique magical items after completing a series of missions pertaining to that particular item. These missions involve one or more quest battles. Win one and you will receive this achievement.

Antique Dealer
Have 10 magic talismans, enchanted or arcane items.


Beast Tamer
Have a Special Mount.


Champion
Have a Level 20 Lord.


The Collector
Have 25 magic weapons or pieces of magic armour.


Councillor
Have 2 level 20 Heroes at the same time.


Exceptionally Able
Use 10 or more special abilities during a campaign


Factor
Have at access to 12 different tradable resources through production or trade.


Forge of the Blind God
Control both Vaul's Anvil (Caledor) and Vaul's Anvil (The Black Coast), in the Eye of the Vortex Campaign.


The Forest Whispers My Name
Control Oreon's Camp and Gaean Vale.


Grand Ambassador
Have a military alliance with 10 other factions at the same time.
This may be easiest to achieve, if you don't confederate any of your races factions as these tend to be easiest to convince to ally with you.

Honour Guard
Have 3 level 30 Heroes at the same time.


Incendiary Tendencies
Raze 30 Settlements in a single campaign


Ipsissimus
Successfully complete the final ritual.
This ritual refers to the final ritual of the Eye of the Vortex campaign. You only have to complete the ritual, not fight the final battle itself.


Living Legend
Win a singleplayer campaign on Legendary difficulty.


Magma Master
Control the Thrice-Cursed Peak, Vaul's Anvil, Titan Peak, and the Star Tower.


Master Diplomat
Have a trade agreement with 10 other factions at the same time.
This may be easiest to achieve, if you don't confederate any of your races factions as these tend to be easiest to convince to trade with you.

The Menagerist
Have 3 special mounts.
On certain levels you may choose to unlock mounts for your lords. This is done by investing a skill point in the mount skill.

Merchant
Have at access to at least 8 different tradable resources through production or trade.


Military Envoy
Have a military alliance with 5 other factions at the same time.
This may be easiest to achieve, if you don't confederate any of your races factions as these tend to be easiest to convince to ally with you. Your races factions may be enough (e.g. High Elves).

Neophyte
Successfully complete a ritual.
The different rituals require different things to become available and casting them requires the sacrifice of currency depending on the faction. This is a relatively easy achievement to acquire.

Paragon
Have a level 30 Lord.


Power Petitioner
Have 3 magic weapons or pieces of magic armour.
As you fight and win battles, your generals will collect magical items.


Reduced to Ashes
Raze 1 Settlement.
Simply select the Raze option after conquering a city.


Retainer
Have 1 level 10 Hero.


Spoils Seeker
Have 10 magic weapons or pieces of magic armour.


Taxman
Have a gross income of 5000 gold per turn.


Tax Collector
Have a gross income of 20,000 gold per turn.


Tax Farmer
Have a gross income of 60,000 gold per turn.


Trader
Have at access to at least 5 different tradable resources through production or trade.
Certain regions have special resources in them which increase trade revenues once you build the appropriate buildings.

Trade Attaché
Have a trade agreement with 5 other factions at the same time.


Treasure Hunter
Have 3 magic talismans, enchanted or arcane items.


The Treasurer
Have 25 magic talismans, enchanted or arcane items.


Veteran
Have a level 10 Lord.


Yarr!!!
Control the pirate city of Sartosa.


Yurrrggghhh!!!
Control Pox Marsh, the Awakening, and the Blood Swamps.

This section covers the various landmark achievements. Landmark settlements offer unique buildings that can be built and some of these buildings unlock achievements.

Camera Obscura
Construct the Chamber of Visions.
The Chamber of Visions is a special building in the minor settlement "Chamber of Visions. It requires a tier 3 settlement and can be built by the following races: Dwarf Realms, Dark Elves, High Elves, Humans, Lizardmen, Skaven, and Tomb Kings. Easiest race is probably Lizardmen who start very close by.


Dreadlord of Hag Graef
Construct the Dark Crag in the sinister city of Hag Graef.
The Dark Crag is a special building in the city of Hag Graef. It can be built by the following races:
Dark Elves, Dwarf Realms, Greenskins, High Elves, Humans, Lizardmen, Skaven, Tomb Kings, Wood Elves, and Vampire Counts


Legacy of the Great Necromancer
Construct the Vault of Nagash.
The vault of Nagash is a special building in the city of Black Pyramid of Nagash. It can be built by the following races: Dark Elves, Dwarf Realms, Greenskins, High Elves, Humans, Lizardmen, Skaven, Tomb Kings, and Vampire Counts


Lothern Sea Helm
Construct the Gates of Lothern in the High Elf capital of Lothern.
The Gates of Lothern is a special building in the city of Lothern. It can be built by the following races: Dark Elves, High Elves, Humans, Lizardmen, Skaven, and Tomb Kings.


Origin Unknown
Construct the Sanctum of Quintex in the Ancient City of Quintex.
The Sanctum is a tier 5 special building in the Ancient City of Quintex. This building can be built by the following races: Dark Elves, High Elves, Lizardmen, Skaven & Tomb Kings.

A Taste for Glory
Play a multiplayer campaign.


First Among Equals
Win 10 multiplayer battles.


Plaguebearer
Defeat CA staff member or anyone else with this achievement during a multiplayer battle.


Spoiling for a Fight
Play a multiplayer battle.
You will receive this achievement after the first multiplayer battle. This can be received on any multiplayer mode.

These achievements are only available through fighting in battles.

Assailant
Win 25 siege attack battles during a single campaign.
This achievement requires you to fight in 25 siege battles on the battlefield map. Autoresolving battles will not count towards this achievement.

Conqueror
With a single unit, make 200 kills during a campaign battle.
Any unit will do and this is quite easily earned. However, you will have to fight this battle manually on the battle map.

Field Marshal
Win 10 battles during a single campaign.
These battles must be fought on the battle map.


Generallissimo
Win 50 battles during a single campaign.
These battles must be fought on the battle map.


Liquidator
With a single Lord, make 100 kills during a battle.


Vanguardian
With a single Hero, make 100 kills during a battle.


Waylayer
Win 5 ambush battles during a single campaign.
These ambushes must be fought on the battle map. It would also appear that they have to be fought during a single play session.

Best Served Cold
Playing as the Dark Elves, occupy or race the fortress city of Lothern in the Eye of the Vortex Campaign.

Black Ark Corsair
Playing as the Dark Elves, construct a Black Ark and upgrade it to the maximum level.
Black Arks can be summoned with the 'Sacrifice for Mathlann' ritual and then recruited in any port city. These function as mobile cities or hordes and may be upgraded. When the main building reaches level 5, Gargantuan Black Ark, this achievement will unlock.

Burnt to Cinders
Playing as the Dark Elves, have at least 3 War Hydras within a single army.


Dark Dragon Lord
Playing as the Dark Elves, recruit a Black Dragon.


Dark Mother Superior
Playing as the Dark Elves, construct the Convent of Sorcery in the city of Ghrond.
Convent of Sorcery is a tier 5 building only available in Ghrond. While it's expensive, it offers decent bonuses later in the game and is probably worth investing in.

Dreadlord
Playing as the Dark Elves, win a singleplayer campaign.


Seer
Playing as the Dark Elves, research 10 technologies.


Slaver
Playing as the Dark Elves, own at least 3 Slave Markets.


Slave Trader
Playing as the Dark Elves, own at least 10 Slave Markets.


Sorceress
Playing as the Dark Elves, research 25 technologies.


Soul Eater
Playing as the Dark Elves, recruit a Cold One Dread Knight unit.


Supreme Sorceress
Playing as the Dark Elves, research 45 technologies.


Tyrant of Naggarond
Playing as the Dark Elves, construct the Black Tower of Malekith in the Dark Elf capital of Naggarond.
The Black Tower of Malekith is a tier 5 building only available in Naggarond. It's rather expensive, but well worth the cost later in the game.

Tyrant of Tor Anlec
Playing as the Dark Elves, construct the Black Citadel of Anlec in the city of Tor Anlec.


Witch King
Playing as the Dark Elves, win a singleplayer campaign on Very Hard or Legendary difficulty.

Archmage
Playing as the High Elves, research 50 technologies.


Asur Ambassador
Playing as the High Elves, own at least 5 Elven Embassies.
Elven Embassies are a level 3 building that can be built in province capitals and regular villages. It offers a boost on trade (factionwide) and ports (province) so you will very likely build a lot of these.

Asur Prince
Playing as the High Elves, win a singleplayer campaign.


Colonial Governor
Playing as the High Elves, own at least 3 Thriving Elven Colonies
Thriving Elven Colony is the level 5 settlement building for the following cities: Dawn's Light, Citadel of Dusk, and Great Turtle Isle cities. All three exist only in Eye of Vortex campaign so this achievement can only be gained in EoV.


Dragon Lord
Playing as the High Elves, recruit a Star Dragon.
Star dragons require a level 5 building (Dragon Keep).

The End of Suffering]
Playing as the High Elves, occupy or raze the Dark Elf capital of Naggarond in the Eye of the Vortex Campaign.

Keeper of the Eternal Flame
Playing as the High Elves, have at least 5 Phoenix Guard units within a single army.


Librarian
Playing as the High Elves, research 10 technologies.


Loremaster of Hoeth
Playing as the High Elves, construct the White Tower of Hoeth.


Mage
Playing as the High Elves, research 25 technologies.


Phoenix King
Playing as the High Elves, win a singleplayer campaign on Very Hard or Legendary difficulty.

Phoenix Lord
Playing as the High Elves, recruit a Frostheart Phoenix.
This achievement is most easily obtained by starting a campaign as Order of Loremasters. Teclis starts off with a Frostheart Phoenix in his army.

Tiranoc Charioteer
Playing as the High Elves, construct the Hall of Charioteers in the city of Tor Anroc.

Cave In
Playing as the Lizardmen, construct the Vaults of Old Ones in the city of Itza.
The City of Itza is located on the southern half of the left side continent (Lustria).


Lookout Below!
Playing as the Lizardmen, recruit a Terradon Riders (Fireleech Bolas) unit.
These require two buildings: A Weapon Crafter's Commune, which is a 4th level building and a Terradon Hatchery, which is a third level building that may be built in a minor settlement.

Old One
Playing as the Lizardmen, win a singleplayer campaign on Very Hard or Legendary difficulty.

Revered Guardian
Playing as the Lizardmen, have at least 5 Temple Guard units within a single army.
Temple Guards are the best infantry troops in the recruitment pool. Just recruit 5 of them in a single army or combine them from multiple armies into a single one. Ending the turn might be required for this to unlock.

See What You Did there...
Playing as the Lizardmen, own at least 3 Scrying Pools.
Scrying Pool is a 3rd level building which can be built in either minor settlements or province capitals.

Skilled Geomancer
Playing as the Lizardmen, own at least 10 Geomantic Loci.
The Geomantic Locus is the final upgrade (5th level) to a Geomantic Web series of buildings. These buildings affect the potency of your commandments so building them is a given. They can only be built in major settlements however, so it will require some time to complete.

Skink Priest Initiate
Playing as the Lizardmen, research 10 technologies.


Skink Priest Adept
Playing as the Lizardmen, research 25 technologies.


Skink Priest Decipherer
Playing as the Lizardmen, research 50 technologies.


Slann Mage-Priest
Playing as the Lizarmen, win a singleplayer campaign.


Stargazer
Playing as the Lizardmen, construct the Stellar Pyramids of the Southern Skies in Hexoatl.
The Stellar Pyramids of the Southern Skies are a 5th level building and therefore will take some time to get, but by no means is it hard. This achievement is perhaps easiest to get, if you start with the Hexoatl Lizardmen faction.

A Taste for Blood
Playing as the Lizardmen, recruit a Feral Carnosaur.
Requires the 5th level building Pyramid of Itzl of the Beast Lair building tree. After constructing it, Feral carnosaurs become available for recruitment. Another way is to use the Rite of Ferocity to summon an army that contains Feral Carnosaurs.

Uplink Established
Playing as the Lizardmen, own at least 2 Geomantic Loci.
The Geomantic Locus is the final upgrade (5th level) to a Geomantic Web series of buildings. These buildings affect the potency of your commandments so building them is a given. They can only be built in major settlements however, so it will require some time to complete.

Abominator
Playing as the Skaven, recruit a Hell-Pit Abomination.
The Hell-Pit Abomination requires a Laboratory to be built. This is a 5th level building. Basic cost of Laboratory is high which may delay the acquisition of this achievement.

Artificer
Playing as the Skaven, research 10 technologies.


Breed Like Rats
Playing as the Skaven, own at least 13 Breeding Pits.
Breeding Pit is a 3rd level building. As it increases growth and corruption, these buildings will probably be buyilt in nearly all regions.

Coldblood, Full Stomach
Playing as the Skaven, occupy or raze the temple-city of Hexoatl in the Eye of the Vortex Campaign.
Hexoatl in the starting city of Hexoatl Lizardmen. It's situated around the equator of the western continent.

Grey Seer
Playing as the Skaven, research 40 technologies.


Herald of Decay
Playing as the Skaven, own at least 3 Temples of the Horned Rat.
Temple of the Horned Rat is a 5th level building. It provides a number of bonuses, most significantly a bonus corruption and public order. While it also boosts recruitment levels, it does so only once. It's not too expensive either.

Inhuman Ingenuity
Playing as the Skaven, recruit a Doomwheel.
Recruiting a Doomwheel requires a Warp-turbine Plant which is a 5th level building. It's moderately priced. Another option is to select Tretch Craventail as a starting Lord who uses a Doomwheel.

Master of Contagion & Disease
Playing as the Skaven, have at least 10 Plague Monks within a single army.
Plague Monks require a Pox Cauldron which is a 3rd level building. Just recruit 10 into a single army and disperse them to other armies after receiving the achievement.

Skaven By Name...
Playing as the Skaven, own at least 13 Scrap Heaps.
Scrap Heaps are a 3rd level building which lowers recruitment costs and increases recruitment capacity.

Warlock Engineer
Playing as the Skaven, research 20 technologies.


Warlord
Playing as the Skaven, win a singleplayer campaign.


Verminlord
Playing as the Skaven, win a singleplayer campaign on Very Hard or Legendary difficulty.

These achievements require the Tomb Kings DLC.

Asp-Irational
Playing as the Court of Lybaras, have at least 3 Necropolis knights within a single army.
Necropolis knights are a cavalry that may be recruited once you build an ancient battle site in a city (third level building). Each one allows the recruitment of 2 necropolis knights which means that two of these buildings are required at the very least.


Black is the New Black
Playing as the Followers of Nagash, construct the Black Tower of Arkhan building during a campaign.

Book Monitor
Playing as the Tomb Kings, collect your first book of Nagash.
The books of Nagash are located in cities or armies. Once you conquer a city or vanquish an army that contains a book, you automatically find it.


Dark Side of Morrslieb
Playing as the Tomb Kings, gain control of the Black Pyramid.


Family Feud
Playing as the Court of Lybaras, kill 1000 Vampire Counts in a single battle.


Fetch Me the Green Stuff!
Playing as the Tomb Kings, craft a magic item within the Mortuary Cult.
You need a certain amount of either resources or gold as well as canopic jars to craft an item within the Mortuary Cult.


King of Kings
Playing as the Tomb Kings, win a singleplayer campaign on Very Hard or Legendary difficulty.

Organ Collector
Playing as the Tomb Kings, collect 1000 Canopic Jars.


Priestly Congregation
Playing as the Exiles of Nehek, have at least 3 Liche Priests within a single army.


See-Nile Crafter
Playing as the Exiles of Nehek, craft everything within the Mortuary Cult.


Settra Rules
Playing as Khemri, occupy all regions of Nehekhara within the Eye of the Vortex Campaign.


That's a Wrap!
Playing as the Tomb Kingss, recruit a Casket of Souls.
A casket of Souls is a siege unit obtainable through using a rite (Great Incantation of Tahoth).

Thralls of Nagash
Playing as the Followers of Nagash, have at least 5 Crypt Ghouls within a single army.


Tombtastic
Playing as Khemri, have at least 5 Tomb Guards within a single army.


Walk Like a Nehekharan
Playing as the Tomb Kings, win a singleplayer campaign.

This requires the Mortal Empires DLC or the first Total War: Warhammer (which unlocks the DLC).

The Good Old Times
Win the Mortal Empires singleplayer campaign with a race from the Old World.

These achievements require the Vampire Coast DLC.

Back in Business
Playing as the Vampire Coast, restore Luthor Harkon's mind by opening the Ancient Vault.


Bottom Dweller
Playing as the Dreadfleet, scavenge the wreck of the Heldenhammer in the Galleon's Graveyard.

Phantasm of the Opera
Playing as the Drowned, construct the Cylostra's Opera House in Lothern.


Know My Name
Gain infamy
An easy achievement gained almost immediately in early campaign. Infamy is a form of resource for vampire coast factions.

Leech
Playing as a Vampire Coast faction, establish a Pirate Cove.
Pirate Coves can be established in a hostile coastal city with either a general after a battle or vampire fleet captain hero. This achievement is bugged so that you may be able to receive in a multiplayer co-op with your partner being a vampire coast faction and establishing a pirate cove.

Scourge of the Seven Seas
Playing as a Vampire Coast faction, defeat seven infamous pirates.


Parrot Talk
Playing as a Vampire Coast faction, collect a Piece of Eight.
Pieces of Eight are carried by roaming pirate factions. Defeat and army in battle and you will receive one. Locations are marked in the quest and this achievement can be gained in single- and multiplayer modes.

X Marks the Spot
Playing as a Vampire Coast faction, solve a treasure map.
Each pirate faction starts with a treasure map. In these, there's a rough drawing of the location where the treasure is. The riddle should provide a closer clue. It must be dug out by altering the lords stance (Dig stance).

Bring Out The Big Guns
Playing as a Vampire Coast faction, recruit Queen Bess.
Queen Bess can be accessed through a rite that costs 1000 gold. Recruiting Queen Bess after this is free, but she does have have an upkeep.

Motley Crew
Playing as the Pirates of Sartosa, recruit 10 units of Sartosa Free Company.


Master of the Seas
Playing as a Vampire Coast faction, win a singleplayer campaign.


A Tale will be Told
Playing as a Vampire Coast faction, win a singleplayer campaign on Very Hard or Legendary difficulty.

I'd like to offer all readers a final reminder that all corrections and questions are welcome. Feel free to drop them in the comment section.

Thanks for checking out this guide, hopefully it wasn't entirely a waste of your time.