Every Atma is linked to wiki were you can read how to obtain it.

Abyssea - Konschtat
Atma of the Voracious Violet - Eccentric Eve
Atma of Cloak and Dagger - Bloodeye Vileberry
Atma of the Stormbird - Turul
Atma of the Noxious Fang - Kukulkan
Atma of Vicissitude - Fistule
Atma of the Beyond - Hadal Satiator
Atma of Stormbreath - Balaur
Atma of Gales - Alkonost
Atma of Thrashing Tendrils - Raskovnik
Atma of the Drifter - Khalamari

Abyssea - La Theine
Atma of the Lion - Hadhayosh
Atma of the Stout Arm - Briareus
Atma of the Twin Claw - Karkinos
Atma of Allure - Carabosse
Atma of Eternity - Ruminator
Atma of the Heavens - Ovni
Atma of the Baying Moon - Lugarhoo
Atma of the Ebon Hoof - Dozing Dorian
Atma of Tremors - Megamaw Mikey
Atma of the Savage Tiger - Megantereon

Abyssea - Tahrongi
Atma of the Stronghold - Lacovie
Atma of the Harvester - Chloris
Atma of Dunes - Glavoid
Atma of the Cosmos - Iratham
Atma of the Siren Shadow - Usurper
Atma of the Impaler - Myrmecoleon
Atma of the Adamantine - Chukwa
Atma of Calamity - Adze
Atma of the Claw - Cuelebre
Atma of Baleful Bones - Mictlantecuhtli

Abyssea - Attohwa
Atma of the Clawed Butterfly - Itzpapalotl
Atma of the Desert Worm - Ulhuadshi
Atma of the Undying - Titlacauan
Atma of the Impregnable Tower - Yaanei
Atma of the Smoldering Sky - Smok
Atma of the Demonic Skewer - Lusca
Atma of the Golden Claw - Kampe
Atma of the Glutinous Ooze - Berstuk
Atma of the Lightning Beast - Maahes
Atma of the Noxious Bloom - Nightshade

Abyssea - Misareaux
Atma of the Gnarled Horn - Sobek
Atma of the Strangling Wind - Amhuluk
Atma of the Deep Devourer - Cirein-croin
Atma of the Mounted Champion - Kutharei
Atma of the Razed Ruin - Ironclad Pulverizer
Atma of the Bludgeoning Brute - Tristitia
Atma of the Rapid Reptilian - Nehebkau
Atma of the Winged Enigma - Avalerion
Atma of the Cradle - Karkatakam
Atma of the Untouched - Nonno

Abyssea - Vunkerl
Atma of the Sanguine Scythe - Bukhis
Atma of the Tusked Terror - Sedna
Atma of the Minikin Monstrosity - Durinn
Atma of the Would-Be King - Sippoy
Atma of the Blinding Horn - Karkadann
Atma of the Demonic Lash - Ketae
Atma of Apparitions - Seps
Atma of the Shimmering Shell - Xan
Atma of the Murky Miasma - Chhir Batti
Atma of the Avaricious Ape - Hanuman

Abyssea - Altepa
Atma of the Merciless Matriarch - Rani
Atma of the Brother Wolf - Orthrus
Atma of the Earth Wyrm - Dragua
Atma of the Ascending One - Bennu
Atma of the Scorpion Queen - Hedjedjet
Atma of a Thousand Needles - Cuijatender
Atma of the Burning Effigy - Brulo
Atma of the Smiting Blow - Ironclad Smiter
Atma of the Lone Wolf - Amarok
Atma of the Crimson Scale - Hazhdiha
Atma of the Scarlet Wing - Ouzelum
Atma of the Raised Tail - Shaula
Atma of the Sand Emperor - Emperador

Abyssea - Uleguerand
Atma of the Omnipotent - Pantokrator
Atma of the War Lion - Apademak
Atma of the Frozen Fetters - Isgebind
Atma of the Plaguebringer - Resheph
Atma of the Shrieking One - Empousa
Atma of the Holy Mountain - Indrik
Atma of the Lake Lurker - Ogopogo
Atma of the Crushing Cudgel - Ironclad Triturator
Atma of Purgatory - Dhorme Khimaira
Atma of Blighted Breath - Kur
Atma of the Persistent Predator - Awahondo
Atma of the Stone God - Blanga
Atma of the Sun Eater - Yaguarogui

Abyssea - Grauberg
Atma of the Despot - Raja
Atma of the Solitary One - Alfard
Atma of the Winged Gloom - Azdaja
Atma of the Sea Daughter - Amphitrite
Atma of the Hateful Stream - Fuath
Atma of the Foe Flayer - Fleshflayer Killakriq
Atma of the Endless Nightmare - Maere
Atma of the Sundering Slash - Ironclad Sunderer
Atma of Entwined Serpents - Ningishzida
Atma of the Horned Beast - Deelgeed
Atma of Aquatic Ardor - Melo Melo
Atma of the Fallen One - Teugghia
Atma of Fires and Flares - Bomblix Flamefinger

Abyssea - Empyreal Paradox
Atma of the Apocalypse - Shinryu


All the Atma's mentioned below you need to buy at the Atma Fabricant.

Titles of HNMs
Atma of the Beast King - Behemoth or King Behemoth
Atma of the Kirin - Kirin
Atma of Hell's Guardian - Pandemonium Warden
Atma of Luminous Wings - Absolute Virtue
Atma of the Dragon Rider - Fafnir or Nidhogg
Atma of the Impenetrable - Adamantoise or Aspidochelone
Atma of Alpha and Omega - Proto-Omega
Atma of the Ultimate - Proto-Ultima
Atma of the Hybrid Beast - Cerberus, Khimaira, or Hydra

Completion of Missions
Atma of the Heir - San d'Oria Rank Missions
Atma of the Hero - Bastok Rank Missions
Atma of the Heavens - Windurst Rank Missions
Atma of Illusions - Zilart Missions
Atma of the Banisher - Chains of Promathia Missions
Atma of the -Sellsword - Treasures of Aht Urhgan Missions
Atma of the Azure Sky - WotG Windurst Quests
Atma of the Truthseeker - WotG Bastok Quests
Atma of Camaraderie - WotG San d'Oria Quests
Atma of Echoes - A Crystalline Prophecy
Atma of Dread - A Moogle Kupo d'Etat
Atma of Ambition - A Shantotto Ascension

Completion of varies Miscellaneous objects
Atma of the Dark Depths - All 4 Salvage areas cleared
Atma of the Zenith - Nyzul Isle Investigation
Atma of Perfect Attendance - Clear all 50 Assault missions
Atma of the Rescuer - Dynamis - Xarcabard win
Atma of Nightmares - Dynamis - Tavnazia win
Atma of the Einherjar - Odin's Chamber win
Atma of the Illuminator - Fiat Lux
Atma of the Bushin - Maat's Cap
Atma of the Ace Angler - Several ways possible, read online.
Atma of the Master Crafter - Guild Signboard
Atma of Ingenuity - Completion of all Abyssea - Altepa Quests
Atma of the Griffon's Claw - Excenmille's Camp: Complete all Quests&Ops(Altepa)
Atma of the Fetching Footpad - Nanaa Mihgo's Camp: Complete all Quests&Ops(Altepa)
Atma of Undying Loyalty - Volker's Camp: Complete all Quests&Ops(Altepa)
Atma of Royal Lineage - Completion of all Abyssea - Uleguerand Quests
Atma of the Shattering Star - Maat's Camp: Complete all Quests&Ops(Uleguerand)
Atma of the Cobra Commander - Romaa Mihgo's Camp: Complete all Quests&Ops(Uleguerand)
Atma of Roaring Laughter - Zazarg's Camp: Complete all Quests&Ops(Uleguerand)
Atma of the Dark Blade - Completion of all Abyssea - Grauberg Quests
Atma of the Ducal Guard - Wolfgang's Camp: Complete all Quests&Ops(Grauberg)
Atma of Harmony - Cornelia's Camp: Complete all Quests&Ops(Grauberg)
Atma of Revelations - Tosuka-Porika's Camp: Complete all Quests&Ops(Grauberg)
Atma of the Savior - 100% completion of all 9 zones